Added 24 October 2026
indefatigable
/ˌɪn.dɪˈfæt.ɪ.ɡə.bəl/ adjective
Latin root: indēfatīgābilis Wiktionary
adjective Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about indefatigable at Wordnik → Where our words come from →
- Extremely persistent and untiring.
Origin
From Middle French, from Latin indēfatīgābilis (“untiring”), from in- (“not”) + dēfatīgō (“to tire out”).
From Wiktionary, via Kaikki.org (CC BY-SA)