cruelTeasing them for being overweight is cruel.
callousHe had a callous disregard for the feelings of others.
cold-bloodedThe budget is based on a cold-blooded analysis of the markets.
ruthlessHe was a ruthless dictator.
sadisticThe killer was described as sadistic.
nastyDon't be so nasty to him!
meanDon't listen to him. He's just being mean.
barbaricThe world must condemn their actions as barbaric.
inhumaneWe are trying to end the most inhumane forms of punishment.
maliciousPeople were spreading malicious rumours about him.