He is stupid. = He is foolish. = He is a fool. = He is silly.
The food is delicious. = The food is tasty. = The food is nice to eat.
They discontinued the work at five. = They stopped the work at five.
is temper is nasty. = His temper is terrible. = He has a bad temper.
He is stubborn. = He is not tame.
The knife is blunt. = The knife is not sharp.
This is expensive. = This is not cheap.
She is talkative. = She is never quiet.
He is a dumb. = He is a person who can not speak.
He refused. = He said “no”.
I’ve never seen such a stubborn person. = I’ve never seen such a person who never listens to other‘s advice.