indefatigable

from WordNet (r) 3.0 (2006)
indefatigable
    adj 1: showing sustained enthusiastic action with unflagging
           vitality; "an indefatigable advocate of equal rights"; "a
           tireless worker"; "unflagging pursuit of excellence"
           [syn: {indefatigable}, {tireless}, {unflagging},
           {unwearying}]
    
from The Collaborative International Dictionary of English v.0.48
Indefatigable \In`de*fat"i*ga*ble\
   ([i^]n`d[-e]*f[a^]t"[i^]*g[.a]*b'l), a. [L. indefatigabilis:
   cf. OF. indefatigable. See {In-} not, and {Defatigable}, and
   cf. {Infatigable}.]
   Incapable of being fatigued; not readily exhausted;
   unremitting in labor or effort; untiring; unwearying; not
   yielding to fatigue; as, indefatigable exertions,
   perseverance, application. "A constant, indefatigable
   attendance." --South.
   [1913 Webster]

         Upborne with indefatigable wings.        --Milton.

   Syn: Unwearied; untiring; persevering; persistent.
        [1913 Webster]
    
from Moby Thesaurus II by Grady Ward, 1.0
88 Moby Thesaurus words for "indefatigable":
      abiding, ardent, assiduous, constant, continuing, continuous,
      determined, diligent, dogged, enduring, energetic, faithful,
      fervent, hard, hardworking, immutable, inalterable, indomitable,
      industrious, inexhaustible, insistent, invincible, laborious,
      lasting, loyal, never idle, never-tiring, obstinate, painstaking,
      patient, patient as Job, permanent, perseverant, persevering,
      persistent, persisting, pertinacious, plodding, plugging,
      preoccupied, rapt, relentless, remaining, resolute, sedulous,
      single-minded, sleepless, slogging, stable, staying, steadfast,
      steady, sticking, strenuous, stubborn, sustained, tenacious,
      tireless, unabating, unceasing, unconquerable, undaunted,
      undiscouraged, undrooping, undying, unfailing, unfaltering,
      unflagging, unflinching, unintermitting, uninterrupted, unnodding,
      unrelaxing, unrelenting, unremitting, unsleeping, unsparing,
      unswerving, untiring, unwavering, unwearied, unwearying, unwinking,
      utterly attentive, vehement, vigorous, weariless, zealous

    

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