PREFIXES

Prefix	Definition	Examples
A	Not, without	Atypical, asymmetrical, anonymous, anecdote, atheist
Ab	Away, from, off	Abduct, abscond, abominate, abrupt
Acro	Above, top, up, topmost, high	Acropolis, acrobat, acronym
Ad	To, toward, against	Adhere, adjudicate, abet, affluent, adversity
An	Not, without	Anonymous, anecdote, anarchy, anomaly, anesthesia, analgesic
Ante	Before	Anteroom, anterior, antedate, antecedent, ante, antebellum
Anti	Before	Anticipate, antique, antiquity
Anti	Against, opposite	Antifreeze, antitrust, antisocial, antibiotic, antagonist,
Auto	Self,	Automobile, autopsy, automat, autograph, automatic, autocrat, autonomy
Be	About, near, make, completely, by	Before, belittle, bespectacled, befuddled, because, bejeweled
Bi	Two	Biscuit, bisect, bicentennial, binoculars, bigamy, bigamist
Bio	Life	Biochemistry, biography, biodegradable, biopsy, biosphere
Circum	around	Circumference, circumnavigate
Co	Together, with	Co-education, cooperate, coexist, coherent
Col	Together, with	Collaborate, collusion, colloquial
Com	Together, with	Compress, complicate, computer
Con	Together, with	Converse, condone, consensus, congenital, consummate
Contra	Against	Contraband, contradict
Cor	Together, with	Correlate, corrupt
Counter	Against	Countermand, counterfeit
De	Aside, away, down, off, from, apart, completely	Demote, decapitate
Dec	Ten	Decathlon, decimate, December
Di	Not, away, apart	Divorce, diversion, diverse, divert
Dia	Through, between	Diameter, dialogue
Dif	Not, away, apart	Diffident, diffuse
Dis	Not, away, apart	Disaster, disease, distract, display Dissect, dismantle, disseminate
Dys	Bad, ill,	Dysfunction, dyslexia, dysentery
E	Out	Eject, emit, emigrate
Em	In, into, on, within	Empower, embrace
En	In, into, on	Enclosure, entrust
Endo	Within	Endocrine, endoderm
Epi	On, upon	Epidermis, epitaph, epitome
Equ	Equal	Equivalent, equinox, equilateral
Es	Out	Escape
Eu	Good, well	Eulogy, eulogize, euthanasia, eucalyptus
Ex	Out	Expel, excavate, extort
Extra	Outside, beyond	Extraterrestrial, extramural, extraneous, extravaganza
For	Away, against	Forget, forbid, forfeit, forgive
Fore	Before, in front of	Forehead, forecast, forerunner,
Geo	Earth	Geocentric, geodesic, geography
Hemi	Half	Hemisphere, hemitrope, hemicycle
Hetero	Different	Heterogeneous, heterosexual, heterodox
Hex	Six	Hexagon, hexameter, hexagram
Homo	Same	Homogenize, homogeneous, homosexual, homologous
Homo	Human	Homicide, homage, Homo sapiens
Hyper	Over	Hyperactive, hyperbole
Hypo	Under	Hypothesis, hypocrisy, hypodermic
Il	In, into	Illumine
Il	Not	Illicit
Im	In, into	Impede
Im	Not	Immobile, impervious, impunity
In	In, into	Insect, induce, innate, incur infer
In	Not	Intangible, inclement, inadvertent
Infra	Beneath, below	Infrastructure, infrared
Inter	Between, beside	Interstate, intermediary, interim
Intra	Within	Intramural, intravenous
Intro	Within	Introduce, introspective, introvert
Ir	In, into	Irrigate
Ir	Not	Irreverent, irredeemable
Mal	Bad	Malnutrition,
Micro	Small	Microbe, micrometer, microfiche, microphone
Mini	Small	Miniscule, miniskirt
Non	Not	Nonentity, nontoxic, nonsense
Ob	Against, toward	Obstruct, obstacle, observe
Omni	All	Omnivorous, omnipotent, omnibus
Op	Against, toward	Oppose, opponent, opposite
Ortho	Straight	Orthodontist, orthopedics
Para	Beside	Paranoid, parable, paraphrase
Per	Through	Pervade, perceive, permit
Peri	Around, near	Periphery, peripheral, periscope
Post	After	Postdate, postscript, postpone
Pre	Before	Prevent, prevail, prejudge, precise
Pro	Forward, before, for, forth	Proclaim, produce, propel, proceed, provide
Pseud	False	Pseudonym
Re	Back, again	Recede, receive
Retro	Backward	Retroactive
Se	Aside, apart	Separate, seclude, secede, secrete
Sub	Under	Submit
Super	Above, over	Superfluous
Un	Not	Unfavorable, unlike, unexpected, unfathomable