| 单词 | indefatigable |
| 释义 | Word Frequency indefatigable(ˌɪndɪˈfætɪɡəbəl) adjective unable to be tired out; unflagging Derived forms indefatigability (ˌindeˌfatigaˈbility) or indefatigableness (ˌindeˈfatigableness) noun indefatigably (ˌindeˈfatigably) adverb Word origin C16: from Latin indēfatīgābilis, from in-1 + dēfatīgāre, from fatīgāre to tire |
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