Synonyms of unyielding

1 Syllable

taut, hard, firm, stiff, staunch, firms, strong, mule, tough, stern, tight, grim

2 Syllables

willful, stiffest, firmest, steely, tautest, headstrong, ferrous, firmer, toughest, froward, sturdy, tightest, stubborn, irons, stiffer, upstream, precast, steadfast, hard-won, puissant, tauter, strongest, brass-bound, hang-tough, ferric, bullhead, solid, chronic, creakier, tough-nut, ruthless, seton, mulish, harder, skintight, flinty, sterner, steeler, fixed, hardshell, hard-line, creaky, hardest, hard-core, sited, tougher, steelier, grimmer, rigid, iron, brassbound, sturdier, grimmest, stronger, buckram, sternest, mullish, dogged, tighter

3 Syllables

hard-hearted, stiff-necked, unbowed, relentless, restive, unruly, unceasing, hardline, tyrannic, unswayable, resisting, difficult, impliable, unsupple, adamant, fine-grained, nonporous, shatterproof, self-willed, unpliable, lingering, unblinking, merciless, bulletproof, hard-nosed, hard-shelled, unbending, ruffianly, uncompliant, untoward, unflinching, hardheaded, strong-willed, resistant, pigheaded, perverse

4 Syllables

implacable, unrelenting, resolute, inductile, iron-fisted, refractory, invincible, contumacious, determined, unbreakable, immovable, remorseless, difficile, immalleable, close-grained, infrangible, nonbreakable, pertinacious, singleminded, ever-present, unabating, obdurate, close-fitting, never-failing, unmovable, indocile, unrepenting, ironfisted, intractable, inelastic, unwaivering, unwavering, single-minded, obstinate, inflexible, heavy-duty, unbendable, iron-willed

5 Syllables

inexorable, inextensible, unadaptable, unpermissive, incompressible, conglomerated, indefeasible, inexpugnable, authoritarian, unattackable, unconquerable, unsurmountable, uncompromising, inalterable, adamantine, opinionated

6 Syllables

unintimidated, opinionative, perseverative