Englishuncompromising
adjective
her uncompromising attitude led to clashes with the governor:
inflexible, unbending, unyielding, unshakeable, unwavering, resolute, unpersuadable, unmalleable, rigid, stiff, hard-line, hard and fast, tough, immovable, intractable, firm, determined, iron-willed, dogged, obstinate, stubborn, not giving an inch, diehard, adamant, obdurate, tenacious, pertinacious, relentless, implacable, inexorable, intransigent, headstrong, pig-headed, bull-headed, single-minded, stiff-necked;
British, informal bloody-minded;
North American, informal badass;
rare indurate.
▷antonyms flexible, compliant.
uncompromising Oxford Dictionary of English