callous Synonyms

calloused insensitive hard hardened thickened indurate obdurate unfeeling pachydermatous heartless insensible cauterize unsparing unregenerate vicious unmerciful vitrified unapologetic vitrify wanton unpitying unsusceptible unimpassioned unashamed unkindly soulless steely stockish stony swooning tearless thick-skinned tough toughened toughen unamiable unblushing uncharitable unconcerned stoic unkind severe barbaric inhumane unresponsive opportunistic pachydermic unreformable unremorseful rocklike