unyielding

I adjective adamant, adamantine, constant, decided, dedicated, determined, devoted, enduring, faithful, firm, fixed, hard, headstrong, immobile, immovable, impliant, indomitable, inductile, inexorable, inflexible, intractable, intransigent, invariable, obdurate, obstinate, opinionated, perseverant, persevering, persistent, pertinacious, perverse, pervicacious, recalcitrant, refractory, relentless, renitent, resisting, resolute, resolved, rigid, sedulous, set, settled, solid, stable, stanch, steadfast, steady, stern, stiff, strong, stubborn, tenacious, tough, true, unbending, unchangeable, uncompromising, uncontrollable, undeviating, ungovernable, unimpressible, uninfluenceable, unmanageable, unpliable, unwavering, wayward, willful, zealous II index barren, callous, chronic, disobedient, dogmatic, durable, fanatical, firm, formidable, froward, immutable, impervious, implacable, impossible, indelible, indestructible, indomitable, industrious, inexorable, inexpugnable, infallible, inflexible, insusceptible (resistant), insusceptible (uncaring), intractable, invincible, ironclad, irreconcilable, obdurate, oppressive, parsimonious, particular (exacting), patient, permanent, persistent, pertinacious, perverse, recalcitrant, relentless, resolute, restive, rigid, sedulous, serious (devoted), severe, solid (compact), stable, staunch, steadfast, strict, stringent, strong, unaffected (uninfluenced), unalterable, unbending, uncompromising, unmitigated, unproductive, unrelenting, unruly, willful