A about = approximately

Prefixes	Meaning	Examples
1	Un	Negative/opposite of..	Unhappy, unjust, unknown, unusual
2	De		Demobilize, decode
3	Dis		Disobey, dislike, discomfort, disagree
4	in		Insecure, insufficient, inappropriate
5	il		illegal, illegible, illiterate, illegitimate
6	im		immoral, immortal, impure, impossible
7	ir		irresponsible, irrelevant
8	anti	Against	antibiotic, antidote, anti-apartheid
9	auto	Of/ by oneself	autobiography, autograph, automatic
10	bi	Two/ twice	bilateral, bilingual, bicycle, bi-monthly
11	semi	Half	semi-final, semi-circular, semi-conscious
12	micro	Very small	microfilm, microcomputer, microscope
13	over	Too much	oversleep, overdose, overcrowded, overdo
14	under	Under-not enough	underestimate, underclothes, underwater
15	sub	Under	submarine, subcutaneous, submerge
16	re	Again-back	reorder, rewrite, retell, replace
17	in	Inside-in	insert, income, internal
18	mono	Single-one	monorail, monosyllable, monogamous
19	poly	Several- many	polyglot, polygon, polygamy, polysyllable
20	mis	Badly-wrongly	misbehave, misjudge, misunderstand
21	en-em(verb)	one does something	enlarge, endanger, enable , empower
22	ex	Former(no longer)	ex-wife, ex-husband, ex-secretary, ex-friend
23	post	After	post-war, post-graduate, post- natal
24	pre-ante	Before	pre-school, pre-mature, antenatal, antedate
25	counter	Against	counter-revolution, counter-attack
26	ultra-super	Above-beyond	ultra fashionable, ultraviolet, superman, su
27	non	Not	non-stop, non-smoker, non-sense
28	ab	From-away	Abnormal
29	inter	Among-between	interchange, interplanetary, international
30	mal	Bad-wrong	malfunction, malformation, maladroit

No		Suffixes	Meaning	Examples
1	Verb Formation	-en	-cause to have/to	-to darken, worsen, blacken
		-ify	increase stated quality.	-to simplify, purify, qualify
		-ise/ize	-cause to become.	-to modernize, industrialize
2	Noun Formation	-ment	-action/process	-development, improvement
		-ity	-state/quality	-Radioactivity, productivity
		-hood	-the same area/period	-Neighbourhood, childhood
		-ism	-Way behaving/ beliefs	-Colonialism, Marxism
		-ion/ation	-process/condition(verb)	-pollution, completion
		-er,or,ist,ian	-occupations/(jobs)	-Writer, actor, pianist
		-ful	-amount/quantity	-handful, spoonful, mouthful
		-ness	-state described by(adj)	-darkness, happiness