Indomitable

indomitable
    adj 1: impossible to subdue [syn: {indomitable}, {never-say-
           die}, {unsubduable}]
    

Indomitable \In*dom"i*ta*ble\, a. [L. indomitabilis; pref. in-
   not + domitare, intens. fr. domare to tame. See {Tame}.]
   Not to be subdued; untamable; invincible; as, an indomitable
   will, courage, animal.
   [1913 Webster]
    

124 Moby Thesaurus words for "indomitable":
      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