Common Prefixes

Common Prefixes:

Placed before a word It changes the meaning

Pre fix	Meaning	Examples
un-	not or opposite	undo, unhappy, unimportant
re-	again or back	redo, remix, return
in-	not or in	invisible
im-	not or in	imperfect
ig-	not	ignorant
il-	not or in	illiterate
ir-	not	irresponsible
dis-	apart	disagree
di-	away	diverge
dif-	opposite	different
en-	to cause to be in a place or state	enact, encourage, encircle
em-	to cause to be in a place or state	employ, empower
non-	not or opposite	nonthreatening, nonfiction, nonstop
in-	in	inside, insight, invest
im-	in	impress
il-	in	illumine
over-	over, too much	overdo, overstate, overload, oversee
mis-	wrong, incorrect	misunderstand, misplace
sub-	below, beneath, under, secondary	subconscious, substandard
pre-	before	predawn, preset, preview
inter-	between, among	intermix, intermingle, intertwine
fore-	before	foretaste, foreclose, forehand
de-	away from, out of	defrost, deforest, deflate
trans-	across	transmit, transfusion, transport
super-	over, big, extreme	superhighway, superhuman
semi-	half, part	semicircle, semiconductor
anti-	against	antidepressant, antifreeze
mid-	middle	midday, midsummer, midnight
under-	below, not enough	underfed, underweight

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affix: an additional element placed at the beginning or end of a root, stem, or word, or in the body of a word, to modify its meaning.
consonant: Sounds which are blocked by the tongue, teeth, or lips in some way.
B, C, D, F, H, G, J, K, L, M, N, P, Q, R, S, T, V, W, X, Y, Z
letter: a character representing one or more of the sounds used in speech; any of the symbols of an alphabet.
prefix: an affix which is placed before the stem of a word. Adding it to the beginning of one word changes it into another word
syllable: An uninterrupted segment of sound which is formed by the opening and closing of the mouth to form vowels.
vowel: A sound the is produced when the mouth is open and not blocked by the lips, teeth, or tongue
a, e, i, o, u
word: a single distinct meaningful element of speech or writing that carries a distinct meaning