adjective
1.
Synonyms: unfeeling 2, callous, coldhearted, hard-boiled, hardhearted, heartless, stonyhearted, uncompassionate, unemotional, unsympathetic
Contrasted words: tender
2.
Synonyms: inflexible 2, adamant, brassbound, dogged, inexorable, relentless, rigid, unbending, uncompromising, unyielding
Related Word: mulish, stiff-necked; immovable
Contrasted words: relenting, submitting