Examples of Prefixes in English

Prefix	Meaning	Examples
de-, dis-	opposite of, not	depose, detour, dehydrated, decaffeinated, discord, discomfort, disengage
trans-	across; move between	transatlantic, transcend, transfer, transact, transport
inter-	between, among	interstate, international, intermission, intermingle, interface
sub-	under	submarine, subtext, substandard, subsitute, subversive
over-	too much	overload, overdo, overact, overboard, overdose
non-	not	nonsense, nonverbal, nonstick, nonspecific
en-, em–	cause to	enjoy, endure, enlighten, entail, empathy,
un-	opposite	uncover, unlock, unsafe, unemployment
semi-	half	semicircle, semiprecious, semicolon, semifinal
re-	again; back	rewrite, reread, return
mid-	middle	midterm, Midwest, midstream, midway, midnight
super-	above	supersonic, superstar, supernatural, superstore
fore-	before	foreshadow, foresight, foreseeable, forecast, foreground
pre-	before	preview, pretest, prevent, preplan
in- , im-, ir–	into; not	invade, implant, imperfect, immoral, inedible, incapable, irregular, irresponsible, irritate
mis–	wrongly	misjudge, misinterpret, misguided, mismatch, misplace