adjective

lacking affection or warmth; unfeeling.

a cold-hearted thief stole a bag full of Christmas presents

unfeeling,unloving,uncaring,unsympathetic,unemotional,unfriendly,uncharitable,unkind,insensitive,indifferent,detached,hard-hearted,stony-hearted,with a heart of stone,heartless,hard,harsh,austere,cold