adjective
1.
Synonyms: grim 3, implacable, ironfisted, merciless, mortal, ruthless, unappeasable, unflinching, unrelenting, unyielding
Related Word: rigorous, strict, stringent; cruel, ferocious, fierce, inhuman
Contrasted words: submissive, yielding
2.
Synonyms: inflexible 2, adamant, dogged, inexorable, obdurate, rigid, single-minded, unbending, uncompromising, unyielding