unyielding, unwavering, unswerving, uncompromising, implacable, unshakable, obstinate, steadfast, unbendable, steely, stubborn, unshakeable, resolute, principled, unflinching, adamantine, dogmatic, obdurate, intransigent, hardheaded, stoic, indomitable, inflexible, rigid, unfaltering, unfailing, unapologetic, doctrinaire, pragmatic, staunch, mulish, abiding, tenacious, imperturbable, unflagging, flinty, individualist, immutable, pugnacious, untempered, unregenerate, incorruptible, indefatigable, immovable, pigheaded, unhesitating, undying, undeviating, stoical, cantankerous, unsentimental, lawyerly, fearless, truculent, ardent, antipathetic, unrelenting, fervent, unchanging, idealist, unabashed, unerring, unstinting, taciturn, empiricist, ornery, absolutist, combative, saintlike, zealous, inscrutable, calvinistic, good naturedness, liberalist, johnsonian, stolid, unafraid, anathema, unrepentant, dauntless, ideological, admirable, unquestioned, perfervid, unchangeable, unquestioning, uncomplaining, irascible, idealistic, unambivalent, defiant, unquestionable, unflappable, soldierly, unreasoned, strident, selfless, avowed, unreasoning, unshaken, ruthless, righteous, irreverence, abatement, alarm, curtailment, danger, diminution, discredit, disfavour, displeasure, drowsiness, embarrassment, excess, flaw, fluctuation, giddiness, hesitation, hindrance, impediment, inclination, indelicacy, dogged, unalterable, vacillating

unadaptable