# indefatigability

> English word · Noun

## Definitions
1. The state of being indefatigable: tirelessness; persistence; stamina.

## Etymology
Attested from the 1630s. Derived as a compound of indefatigable + -ity.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/indefatigability