Meaning of indefatigable

in•de•fat•i•ga•ble

Pronunciation: (in"di-fat'i-gu-bul), [key]
— adj.
  1. incapable of being tired out; not yielding to fatigue; untiring.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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