Added 10 October 2026
tireless
adjective
adjective Definition from Wiktionary (CC BY-SA). More about tireless at Wordnik → Where our words come from →
- Indefatigable, untiring and not yielding to fatigue
adjective
Origin
From tire (“to become sleepy or weary”) + -less.
From Wiktionary, via Kaikki.org (CC BY-SA)