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.
heartlessHe has been described as a heartless boss by several employees.
sadisticThe killer was described as sadistic.
nastyDon't be so nasty to him!
meanDon't listen to him. He's just being mean.
inhumaneWe are trying to end the most inhumane forms of punishment.
maliciousPeople were spreading malicious rumours about him.