She is not happy.
unhappy
He is not friendly.
unfriendly
I am not well.
unwell
It is not safe.
unsafe
The floor is not clean.
unclean
They are not comfortable.
uncomfortable
She is not kind.
unkind
I am not able to do it.
unable
It is not clear.
unclear
It is not true.
untrue
I am not finished.
unfinished
I am not certain.
uncertain
It is not lucky.
unlucky
It is not usual.
unusual
