# indefatigably

> English word · Adverb · IPA /ˌɪndəˈfætəɡəbli/

## Definitions
1. In an extremely persistent and untiring manner; in an indefatigable manner

## Etymology
From indefatigable + -ly, but indefatigable itself was attested later. In use since the 16th century.

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