callous

adjective

Showing or having an insensitive and cruel disregard for others.

noun

Variant spelling of callus.

SYNONYMS

as hard as nailsbloodlessbrutalcase-hardenedcoldcold-bloodedcold-heartedcruelhard-bittenhard-boiledhard-heartedhardenedharshheartlessindifferentindurateinduratedinsensibleinsensitivelacking compassionmarble-heartedruthlesssoullessstony-hearteduncaringuncharitableunconcernedunfeelingunsusceptibleunsympatheticwith a heart of stone