Found 2 items, similar to indefatigable.
English → English (WordNet) Definition: indefatigable indefatigable adj : showing sustained enthusiastic action with unflagging vitality; “an indefatigable advocate of equal rights”; “a tireless worker”; “unflagging pursuit of excellence” [syn: tireless, unflagging, unwearying]
English → English (gcide) Definition: Indefatigable 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]