A prefix is placed at the beginning of a word to modify or change its meaning. This is a list of the most common prefixes in English, together with their basic meaning and some examples. You can find more detail or precision for each prefix in any good dictionary.
A prefix goes at the beginning of a word. A suffix goes at the end of a word.
The origins of words are extremely complicated. You should use this list as a guide only, to help you understand possible meanings. But be very careful, because often what appears to be a prefix is not a prefix at all. Note also that this list does not include elements like «auto-» or » bio-«, because these are «combining forms», not prefixes.
| prefix | meaning | examples | |
|---|---|---|---|
| a- | also an- | not, without | atheist, anaemic |
| a- | to, towards | aside, aback | |
| in the process of, in a particular state | a-hunting, aglow | ||
| a- | of | anew | |
| completely | abashed | ||
| ab- | also abs- | away, from | abdicate, abstract |
| ad- | also a-, ac-, af-, ag- al-, an-, ap-, at- as-, at- | movement to, change into, addition or increase | advance, adulterate, adjunct, ascend, affiliate, affirm, aggravate, alleviate, annotate, apprehend, arrive, assemble, attend |
| ante- | before, preceding | antecedent, ante-room | |
| anti- | also ant- | opposing, against, the opposite | anti-aircraft, antibiotic, anticlimax, Antarctic |
| be- | all over, all around | bespatter, beset | |
| completely | bewitch, bemuse | ||
| having, covered with | bejewelled | ||
| affect with (added to nouns) | befog | ||
| cause to be (added to adjectives) | becalm | ||
| com- | also co-, col-, con-, cor- | with, jointly, completely | combat, codriver, collude, confide, corrode |
| contra- | against, opposite | contraceptive | |
| counter- | opposition, opposite direction | counter-attack, counteract | |
| de- | down, away | descend, despair, depend, deduct | |
| completely | denude, denigrate | ||
| removal, reversal | de-ice, decamp | ||
| dia- | also di- | through, across | diagonal |
| dis- | also di- | negation, removal, expulsion | disadvantage, dismount, disbud, disbar |
| en- | also em- | put into or on | engulf, enmesh |
| bring into the condition of | enlighten, embitter | ||
| intensification | entangle, enrage | ||
| ex- | also e-, ef- | out | exit, exclude, expand |
| upward | exalt, extol | ||
| completely | excruciate, exasperate | ||
| previous | ex-wife | ||
| extra- | outside, beyond | extracurricular | |
| hemi- | half | hemisphere | |
| hyper- | beyond, more than, more than normal | hypersonic, hyperactive | |
| hypo- | under | hypodermic, hypothermia | |
| in- | also il-, im- | not, without | infertile, inappropriate, impossible |
| also il-, im-, ir- | in, into, towards, inside | influence, influx, imbibe | |
| infra- | below | infrared, infrastructure | |
| inter- | between, among | interact, interchange | |
| intra- | inside, within | intramural, intravenous | |
| non- | absence, negation | non-smoker, non-alcoholic | |
| ob- | also oc-, of-, op- | blocking, against, concealing | obstruct, occult, offend, oppose |
| out- | surpassing, exceeding | outperform | |
| external, away from | outbuilding, outboard | ||
| over- | excessively, completely | overconfident, overburdened, overjoyed | |
| upper, outer, over, above | overcoat, overcast | ||
| peri- | round, about | perimeter | |
| post- | after in time or order | postpone | |
| pre- | before in time, place, order or importance | pre-adolescent, prelude, precondition | |
| pro- | favouring, in support of | pro-African | |
| acting for | proconsul | ||
| motion forwards or away | propulsion | ||
| before in time, place or order | prologue | ||
| re- | again | repaint, reappraise, reawake | |
| semi- | half, partly | semicircle, semi-conscious | |
| sub- | also suc-, suf-, sug-, sup-, sur-, sus- | at a lower position | submarine, subsoil |
| lower in rank | sub-lieutenant | ||
| nearly, approximately | sub-tropical | ||
| syn- | also sym- | in union, acting together | synchronize, symmetry |
| trans- | across, beyond | transnational, transatlantic | |
| into a different state | translate | ||
| ultra- | beyond | ultraviolet, ultrasonic | |
| extreme | ultramicroscopic | ||
| un- | not | unacceptable, unreal, unhappy, unmanned | |
| reversal or cancellation of action or state | unplug, unmask | ||
| under- | beneath, below | underarm, undercarriage | |
| lower in rank | undersecretary | ||
| not enough | underdeveloped |
prefixes
A prefix is placed at the beginning of a word to modify or change its meaning. This is a list of the most common prefixes in English, together with their basic meaning and some examples. You can find more detail or precision for each prefix in any good dictionary.
A prefix goes at the beginning of a word. A suffix goes at the end of a word.
The origins of words are extremely complicated. You should use this list as a guide only, to help you understand possible meanings. But be very careful, because often what appears to be a prefix is not a prefix at all. Note also that this list does not include elements like «auto-» or » bio-«, because these are «combining forms», not prefixes.
Question Forms
We make questions by:
1: moving an auxiliary to the front of the clause:
| Everybody is watching | >> | Is everybody watching? |
| They had worked hard | >> | Had they worked hard? |
| He’s finished work | >> | Has he finished work? |
| Everybody had been working hard | >> | Had everybody been working hard? |
| He has been singing | >> | Has he been singing? |
| English is spoken all over the world | >> | Is English spoken all over the world? |
| The windows have been cleaned | >> | Have the windows been cleaned? |
2: … or by moving a modal to the front of the clause:
| They will come | >> | Will they come? |
| He might come | >> | Might he come? |
| They will have arrived by now | >> | Will they have arrived by now? |
| She would have been listening | >> | Would she have been listening? |
| The work will be finished soon | >> | Will the work be finished soon? |
| They might have been invited to the party | >> | Might they have been invited to the party? |
3: The present simple and the past simple have no auxiliary. We make questions by adding the auxillary do/does for the present simple or did for the past simple:
| They live here | >> | Do they live here? |
| John lives here | >> | Does John live here? |
| Everybody laughed | >> | Did everybody laugh? |
Prefixes List A to Z in English Grammar Pdf!
What are Prefixes in English Grammar?
A prefix is a group of letters placed before the root of a word. A prefix is placed at the beginning of a word to modify or change its meaning. Prefixes are letters which we add to the beginning of a word to make a new word with a different meaning.
Examples
|
about, become | befriend |
|
good | benevolent |
|
two, twice | Biannual, bishop |
Prefixes List A to Z in English Grammar
Here is the quick list of prefixes from a to z:
| Prefix | Meaning | Example |
| ab | from, away | Abnormal, absorb, abstain |
| a | not, without | abyss |
| ad | to, toward, near | Adjacent, adjoin, adsorb |
| ambi | both | Ambidextrous, ambient |
| ante | before | Antecedent, antelope, antefixa |
| ante- | before | antenatal, antedate |
| anti- | against, opposing | antidepressant, antidote, antibody |
| arch | chief, most important | Archangel, arch-nemesis |
| a | at, in, on, to | asleep |
| at | to, toward | attend |
| auto | self | automobile |
| be | about, become | befriend |
| bene | good | benevolent |
| bi | two, twice | Biannual, bishop |
| circum- | around | circumvent, circumnavigate |
| co | with, together | coexist |
| con | with, jointly | concur |
| contra | against | contradict |
| counter | opposite | counterclockwise |
| co- | with | co-pilot, co-operation |
| deca | ten | decathlon |
| demi | half | Demigod, decode, debug |
| de- | off, down, away from | defrost, derail, demotivate |
| dia | through, across | diameter |
| dis- | opposite of, not | disappear, disintegrate, disapprove, disconnect |
| di | two | divert |
| dys | bad, abnormal | dysfunction |
| Em- | Cause to | Embrace, emphasis |
| em-, en- | cause to, put into | encode, embed, enclose, engulf |
| en | to cause, provide | enable |
| En- | Cause to | Encode, encounter |
| endo | internal | endocrine |
| epi- | upon, close to, after | episcope, epidermis |
| equi | equal | equidistant |
| ethno | race, nation | ethnography |
| ex- | former, out of | ex-boyfriend, exterminate |
| extra- | beyond, more than | extraordinary, extra-terrestrial |
| fore- | before | forecast, forehead, foresee, foreword, foremost |
| Fore- | Before | Forecast, foresight |
| homo- | same | homonuclear, homoplastic |
| hyper- | over, above | hyperactive, hyperventilate |
| Im- | İn | Imbalance |
| il-, im-, in-, ir- | not | illegal, irresponsible, indefinite |
| In- | İn | Infield, infiltrate |
| infra- | beneath, below | infrared, infrasonic, infraspecific |
| In-, im-, il-, ir- | Not | Injustice, impossible, irregular |
| im-, in- | into | insert, import, inside |
| inter-, intra- | between | intermediate, intergalactic, intranet |
| macro- | large | macroeconomics, macromolecule |
| micro- | small | microscope, microbiology, microfilm, microwave |
| mid- | middle | midway, midsummer |
| mis- | wrongly | misinterpret, misfire, mistake, misunderstand |
| mono- | one, singular | monobrow, monolithic |
| non- | not, without | nonsense, nonentity, nondescript |
| omni- | all, every | omnivore, omnipotent |
| Over- | Over | Overlook, overdue |
| para- | beside | paramedic, paradox |
| post- | after | post-mortem, postpone, post-natal |
| pre- | before | prefix, predetermine |
| Pre- | Before | Prefix, preschool |
| re- | again | return, reiterate, reunite, rebuilt |
| semi- | half | semi-final, semiconscious, semicircle |
| Sub- | Under | Subeditor, subterranean |
| sub- | under | submarine, sub-category, subtitle |
| super- | above, over | superfood, superstar, supernatural, superimpose |
| therm- | heat | thermometer, thermostat, thermodynamic |
| trans- | across, beyond | transport, transnational, transatlantic |
| tri- | three | triangle, tripod, tricycle |
| Under- | Under | Understand, undersea |
| un- | not | unfinished, unfriendly, undone, unknown |
| Un- | Not | Unfriendly, unsatisfied |
| uni- | one | unicycle, universal, unilateral, unanimous |
Related: List of Common Suffixes A to Z
Infographics (Prefixes List a to z)
List of Common Prefixes A to Z PDF (Download Here)
About The Author
Prefix definition: an affix attached to the beginning of a word to modify its meaning.
Suffix definition: a particle attached to the end of a word to modify its meaning or change it into a different word class.
What is the Difference Between Prefixes and Suffixes?
In the English language, we often place prefixes and suffixes at the beginning and end, respectively, of a word in order to modify it.
The original word does have meaning in itself, but by adding a prefix or suffix to it, we change the word.

- Janet resubmitted her application after she was initially denied a loan.
Resubmitted includes the prefix re which means again.
What is a suffix? Suffixes are placed at the end of a word in order to alter its meaning or change the classification of the word.
- We work hard in order to ensure our children’s happiness.
Happiness includes the state of being suffix ness. By adding the suffix, we have changed our word from an adjective to a noun in order for it to fit grammatically in our sentence.

Prefix Examples:
- a-, an- = without; amoral, anemic
- ante- = before; antecedent
- co- = with; co-worker
- de- = off, remove; de-ice
- ex =out of, former; ex-boyfriend
- il = not; illegal
- inter = between; intergalactic
- post = after; postpone
- super = above; supersede
- un = not; unnatural
Let’s try using a prefix in a sentence.
- Craig was dissatisfied with the customer service he received at the store.
- Prefix = dis = negative
When to Hyphenate Prefixes

Proper nouns: when adding a prefix to a proper noun, you must add a hyphen:
- Not liking apple pie may be seen as un-American.
Same vowel: If the last letter of your prefix is the same as the first letter in the word, you need to add a hyphen:
- In order to be allowed re-entry to the amusement park, patrons must obtain a stamped ticket.
Special prefixes: Always use a hyphen when you use ex- and self-.
- Lisa was self-conscious about her body after having a baby.
- The ex-student body president trained the current officer on how to organize prom.
Clarification: Use a hyphen when a word may cause confusion or look odd in the sentence.
- The mother reminder the children to re-cover the sandbox after they were done playing.
We need the hyphen, so that readers don’t confuse re-cover with the word recover, which means to reinstate health or regain a lost possession.
What are Suffixes?

Suffix Examples:
- –al = having characteristics of; remedial, denial
- –ed = past-tense verbs; traveled, talked
- –en = made of, consisting of; wooden, golden
- –er, -est = comparative; stronger, strongest
- –tion, -ion = state of being, condition; completion, relation
- –ity = quality of; humility, enormity
- –less = without; hopeless, homeless
- –ly = characteristic of; brotherly, lovely
- –s, -es = more than one; apples, trenches
Let’s look at an example of a suffix used in a sentence:
- In government class, students will research the current election.
- Suffix = ion = act, process
When to Hyphenate Suffixes

Cumbersome words: an optional hyphen can be used when a word seems lengthy without one.
- community-wide
Exception words: -like, -type, -elect,
- scholarly-like
When last letter is same as first letter:
- graffiti-ism, past-tense
Summary
Define prefix: the definition of prefix is an element placed at the beginning of a word to alter or qualify its meaning.
Define suffix: the definition of suffix is a particle placed at the end of a word to alter its meaning or adjust its grammatical sense.
In summary,
- Prefixes and suffixes are added to words to change them.
- Prefixes are added to change the meaning of the root word.
- Suffixes are added so that the word will make grammatical sense in a sentence.
Here are a couple of final examples of how we use prefixes and suffixes.
- Many science fiction books include an intergalactic war.
- Prefix = inter = between
- The employee rushed to his car after work on Friday.
- Suffix = ed = past-tense verb
Contents
- 1 What is the Difference Between Prefixes and Suffixes?
- 2 What are Prefixes?
- 3 When to Hyphenate Prefixes
- 4 What are Suffixes?
- 5 When to Hyphenate Suffixes
- 6 Summary
- Prefix
-
A prefix is a type of affix attached to a stem which modifies the meaning of that stem.
The word «prefix» is itself made up of the stem «fix» (meaning «attach» in this case), and the prefix «pre-«, meaning «before», both of which are derived from Latin roots.
ee also
*English prefixes
*Prefixes and suffixes in HebrewExternal links
* [http://www.prefixsuffix.com/ comprehensive reference for English prefixes and suffixes]
* [http://www.prefixsuffix.com/affixes.php more about English language prefixes and affixes in general]
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Look at other dictionaries:
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préfix — préfix, ixe [ prefiks ] adj. • XIVe; lat. præfixus ♦ Dr. Vx Déterminé, fixé d avance. Au jour et au lieu préfix, au terme préfix (⇒ préfixion) . ⊗ HOM. Préfixe. ● préfix, préfixe adjectif (latin praefixus, placé avant) Délai préfix, délai… … Encyclopédie Universelle
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préfix — préfix, ixe (pré fiks, fi ks ; l x se prononçait d après Chifflet, Gramm. p. 218, comme ch) adj. Fixé d avance, déterminé. • Au jour et au lieu préfix, Monsieur enverrait sans délai un pareil nombre de personnes, RETZ III, 100. • Daniel n… … Dictionnaire de la Langue Française d’Émile Littré
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prefix — PREFÍX, prefixe, s.n. 1. Afix care se ataşează înaintea rădăcinii sau a temei unui cuvânt, pentru a forma un derivat. 2. (În telefonia interurbană automată) Număr care indentifică o anumită localitate sau ţară şi se formează înaintea numărului de … Dicționar Român
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prefix — Prefix, [pref]ixe. adj. Arresté, determiné. Jour prefix. temps prefix. heure prefixe. somme prefixe. On appelle, Doüaire prefix, Le douaire qui consiste en certaine somme marquée & determinée par les conventions matrimoniales … Dictionnaire de l’Académie française
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Prefix — Pre*fix , v. t. [imp. & p. p. {Prefixed}; p. pr. & vb. n. {Prefixing}.] [L. praefixus, p. p. of praefigere to fix or fasten before; prae before + figere to fix: cf. F. pr[ e]fix fixed beforehand, determined, pr[ e]fixer to prefix. See Fix.] [1913 … The Collaborative International Dictionary of English
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prefix — ► NOUN 1) a word, letter, or number placed before another. 2) an element placed at the beginning of a word to alter its meaning (e.g. non , re ) or (in some languages) as an inflection. 3) a title placed before a name (e.g. Mr). ► VERB 1) add as… … English terms dictionary
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prefix — [prē′fiks΄; ] for v., also [ prē fiks′] vt. [ME prefyxen < MFr prefixer < L praefixus, pp. of praefigere < prae , before (see PRE ) + figere, to FIX] 1. to fix to the beginning of a word, etc.; esp., to add as a prefix 2. Rare to fix… … English World dictionary
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Prefix — Pre fix, n. [Cf. F. pr[ e]fixe.] That which is prefixed; esp., one or more letters or syllables combined or united with the beginning of a word to modify its signification; as, pre in prefix, con in conjure. [1913 Webster] … The Collaborative International Dictionary of English
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prefix — In grammar, a prefix is a word or element added at the beginning of another word to adjust or qualify its meaning, such as ex (ex husband), non (non smoking), and super (supermodel) … Modern English usage
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prefix — early 15c. (v.), 1640s (n.), from L. praefixus, pp. of praefigere fix in front, from prae before (see PRE (Cf. pre )) + root of figere to fasten, fix (see FIX (Cf. fix)) … Etymology dictionary
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prefix — I UK [ˈpriːfɪks] / US [ˈprɪˌfɪks] noun [countable] Word forms prefix : singular prefix plural prefixes 1) linguistics a group of letters that is added to the beginning of a word to change its meaning. For example, the prefix un is added to the… … English dictionary



