efficient → _____efficient
inefficient
true → _____true
untrue
prepared →_____prepared
unprepared
reliable → _____reliable
unreliable
breakable →_____breakable
unbreakable
polite → ____polite
impolite
direct → ___direct
indirect
fair →_____fair
unfair
tidy → _____tidy
untidy
popular → _____popular
unpopular
cool → _____cool
uncool
believable→ _____believable
unbelievable
definite → _____definite
indefinite