English

1)able - unable
2)accurate - inaccurate
3)active - inactive
4)agree - disagree
5)button - unbutton
6)comfortable - uncomfortable
7)convinient - inconvinient
8)credible - incredible
9)direct - indirect
10)experienced - inexperienced (unexperienced)
11)fair - unfair
12)fold - unfold
13)formal - informal
14)fortunate - unfortunate
15)hear - mishear
16)like - unlike or dislike
17)necessary - unnecessary
18)pack - unpack
19)patient - inpatient
20)plesant - unpleasant
21)possible - impossible
22)pronounce - mispronounce
23)spell - misspell
24)tolerant - intolerant
25)usual - unusual
26)willing - unwilling
27)just - unjust
28)kind - unkind
29)satisfactory - unsatisfactory
30)appropriate - inappropriate
31)sincere - insincere
32)legible - illegible
33)legal - illegal
34)literate - illiterate
35)regular - unregular(irregular)
36)relevant - irrelevant
37)responsible - irresponsible
38)mature - immature
39)probable - improbable
40)moral - immoral
41)screw - unscrew
42)do - undo
43)tie - untie
44)appear - disapper
45)quality - disquality
46)understand - misunderstand
47)read - misread