Prefixes

A prefix is an element which we place at the front of a word.

In English, prefiexes add something to the meaning of a word, but they do not usually change its word class (do not change part of speech of that word).

Let's see some examples in the table below.

Prefix	Word	Meaning
a-	ahead, afloat	[see a-word]
anti-	antisocial, anti-war, antivirus	against
arch-	archenemy, archduke	supreme, highest
bi-	bicycle, biplane	two
co-	cooperate, cooperation, copilot	with
de-	decrease, descend	down or negative
dis-	disconnect, disown, dislike	do the opposite of
ex-	export1, ex-president2	1Out of, 2former
fore-	foreground1, foretell2	1in front of, 2before
im-	improper, impossible, impolite	not
in-	income1, incomplete2	1in, 2not
inter-	international, Internet	between or among
mal-	malformed, maltreat, malfunction	badly
mis-	mishear, mislead, misunderstand	wrongly
mono-	monorail, monosyllabic	one
multi-	multi-purpose, multiracial	many
non-	nonsense, non-smoker	not
out-	outcast1, outnumber2	1out, 2more than
over-	overeat, overwork	too much
post-	postpone, post-war	after
pre-	preface, pre-war	before
pro-	provide, pro-communist	for, on behalf of
re-	return, re-use, repay	back or again
sub-	subconscious, subdivide, sub-menu	under, below
super-	supermarket, superman	higher, superior
trans-	transalantic, transact	across
un-	unfair1, untie2	1negative, 2opposite to
under-	undercooked, underdeveloped, underpaid	too little, not enough

I hope this article helps. If you have any question, please leave a comment below.