A
able
What is unable?
certain
What is uncertain?
finished
What is unfinished?
pack
What is unpack?
appear
What is disappear?
do
What is undo?
clean
What is unclean?
even
What is uneven?
worthy
What is unworthy?
loyal
What is disloyal?
fortunate
What is unfortunate?
dress
What is undress?
happy
What is unhappy?
wrap
What is unwrap?
obedient
What is disobedient?
bolt
What is unbolt?
equal
What is unequal?
healthy
What is unhealthy?
kind
What is unkind?
own
What is disown?
button
What is unbutton?
even
What is uneven?
pack
What is unpack?
fair
What is unfair?
agree
What is disagree?