Pronunciation : (in'di-fat'i-ga-bul)
1. Incapable of being fatigued
3. Having or showing a capacity for protracted effort, regardless of difficulty or frustration
4.Showing sustained enthusiastic action with unflagging vitality
Obsolete French indefatigable, from Latin indefatigabilis : in-, not; see in–1 + defatagare, to tire out de-, intensive pref. see de– + fatīgāre, to weary
• The optimism of a healthy mind is indefatigable.
• Chief among those who did this fetching and carrying was Captain Bildad's sister, a lean old lady of a most determined and indefatigable spirit.
Indefatigability : Noun
Indefatigably : Adverb
Indefatigableness : Noun
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