indefatigable C2 Topic:Register & Style US /ˌɪn.dəˈfæt.ɪ.ɡə.bəl/ UK /ˌɪn.dɪˈfæt.ɪ.ɡə.bəl/ See IPA manual Freq #60840 Meanings 1 adj showing sustained enthusiastic action with unflagging vitality An indefatigable advocate of equal rights. Thesaurus Synonyms 1 adj · showing sustained... unflagging Word family Forms indefatigably Etymology From Middle French, from Latin indēfatīgābilis (“untiring”), from in- (“not”) + dēfatīgō (“to tire out”). Topics Register & Style External links Cambridge Dictionary Wiktionary Google Images # indefatigable **Type:** Word **Level:** C2 **Part of speech:** adj **IPA (US):** /ˌɪn.dəˈfæt.ɪ.ɡə.bəl/ **IPA (UK):** /ˌɪn.dɪˈfæt.ɪ.ɡə.bəl/ **Frequency rank:** 60840 ## Meanings 1. showing sustained enthusiastic action with unflagging vitality ## Examples - An indefatigable advocate of equal rights. ## Synonyms - unflagging ## Etymology From Middle French, from Latin indēfatīgābilis (“untiring”), from in- (“not”) + dēfatīgō (“to tire out”). ## Topics - Register & Style markdown