adjective

displaying a complete lack of feeling or consideration.

heartless thieves stole the pushchair of a two-year-old boy

unfeeling,unsympathetic,unkind,uncaring,unloving,unmoved,unconcerned,insensitive,inconsiderate,hard-hearted,stony-hearted,cold-hearted,cold-blooded,with a heart of stone,lacking compassion,mean-spirited,without sentiment,hard as nails,cold,hard,harsh,stern,callous,cruel,brutal,merciless,pitiless,ruthless,inhuman