Indomitable

Adjective

 * 1) Incapable of being subdued, overcome, or vanquished.
 * 2) * 1902, A. E. W. Mason, The Four Feathers, ch. 1:
 * Personal courage and an indomitable self-confidence were the chief, indeed the only, qualities which sprang to light in General Feversham.
 * 1) * 1910, William Henry Hudson, A Shepherd's Life, ch. 7:
 * But he was a youth of indomitable spirit, strong and agile as a wild cat.
 * 1) * 2007, Richard Corliss, "When Betty Got Frank," Time, 31 March:
 * Nobody came on to the movie camera—wrapped it in a bear hug and wrestled it to submission—like Betty Hutton. They called this 40s singer-actress "the Blitzkrieg blond" . . . . [S]he was indomitable, unstoppable.

Synonyms

 * impregnable, inexpugnable, insuperable, insurmountable, invincible, never-say-die, unbeatable, unconquerable, unsubduable, unsurmountable, unvanquishable

Adverbs for Indomitable
sturdily; resolutely; determinedly; surprisingly; unexpectedly; marvelously; invincibly; vigorously;  staunchly; stubbornly; heroically; gallantly; bravely; boldly; courageously; habitually; hardily; irresistibly.

Thesaurus
assiduous, beyond control, brave, breachy, constant, continuing, contumacious, courageous, dauntless, defiant, determined, diligent, dogged, enduring, faithful, fearless, fractious, immutable, impassable, impenetrable, impregnable, inalterable, incontestable, incorrigible, indefatigable, indocile, industrious, inexpugnable, insistent, insuperable, insuppressible, insurmountable, intractable, intrepid, invincible, inviolable, invulnerable, irrepressible, irresistible, lasting, loyal, mettlesome, never-tiring, obstinate, obstreperous, out of hand, overpowering, overwhelming, patient, patient as Job, permanent, perseverant, persevering, persistent, persisting, pertinacious, plodding, plucky, plugging, preoccupied, rapt, recalcitrant, refractory, relentless, resistant, resisting, resistless, resolute, resolved, restive, sedulous, shrewish, single-minded, sleepless, slogging, stable, staunch, steadfast, steady, stubborn, tenacious, tireless, unabating, unafraid, unassailable, unbeatable, unbiddable, unconquerable, uncontrollable, undaunted, undefeatable, undisciplined, undiscouraged, undrooping, unfailing, unfaltering, unflagging, unflinching, ungovernable, unintermitting, uninterrupted, unmalleable, unmanageable, unmoldable, unnodding, unrelaxing, unrelenting, unremitting, unruly, unsleeping, unstoppable, unsubduable, unsubmissive, unsurmountable, unswerving, untiring, unwavering, unwearied, unwearying, unwinking, unyielding, utterly attentive, weariless, wild

Etymology
From the indomitabilis, in- "not" + domitare frequentive of domare "to tame"

Translations

 * Chinese:
 * Mandarin: 不屈不撓, 不屈不挠, 頑強, 顽强
 * Finnish: ,
 * French:


 * Greek:, , , ακατανίκητος
 * Polish: nieugięty
 * Russian: неукротимый