Prefixes and suffixes

PREFIXES
A prefix (affix) is a word, or letter(s) placed at the beginning of another word (a base word) to adjust or qualify its usage or meaning. The opposite of prefix is suffix.

in, into,: in,il, im, ir , en, intro – infiltrate. illuminate, import, irrigate, enlist, introduce
*inside, within: intro, intra, endo – introspection, intravenous, endogenous
to, toward, ob: ad, ac, ag, at –adjust, accommodate, aggression, attract, observe
*forth, forward: pro – proclaim
beside, by: para – parallel, paraphrase
*between, among: inter, dia – intervene, dialogue
*outside: extra, extro,epi- extraterrestrial, extrovert, epidermis
with, at the same time: com, con, cor, syn, sym – company, contemporary, correlate, synchronize, symphony
*after: post – postwar, posterior
*before: pre,ante, pro – precede, antebellum, prologue
down: de – descend
*under, beneath: sub – subway
*above, over: super – superior, supersensitive
*back, backward: re, retro – retreat, retroactive
around,about: circum, peri – circumference, perimeter
through, throughout: per – perennial
*across: trans, dia- transport, transatlantic, diameter
beyond: ultra, extra – ultrasonic, ultraconservative,extraordinary, extrapolate
apart: se – secular, separate
from, away from: ab, abs – absolve, abstain
off, away: dis, di- dismiss, divert
*out, out of: ex, ec – exit, expel, exorcist, eccentric
*not:un, in, il, im, ir, dis, non, a – unpleasant, indecisive, illogical, impolite, irrelevant, disapprove, nonviolent, atypical;
*reversal: un, de, dis, counter – unsettle, deregulate, disarm,countermand
*one, single, alone: mono, mon, uni- monorail, monocular, uniform
*two, twice: di, bi, bin- dioxide, bicycle, binocular
*three: tri – triangle, tricycle
*four: tetr, quadr – tetrahedron,quadrangle
*five: pent, quintus – pentathlon, quintuplet
*six: hexa, hex, sex – hexagon, sextet
seven: help, sept, septem – heptagon, September
*eight: oct – octet, October
*nine: nove – November,...