adj. 25B6; adjective UNFEELING, unsympathetic, unkind, uncaring, unconcerned, insensitive, inconsiderate, hard-hearted, stony-hearted, cold-hearted, mean-spirited; cold, callous, cruel, merciless, pitiless, inhuman.
compassionate.
HEARTLESS
Meaning of HEARTLESS in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012