# tireless

> English word · Adjective · frequency rank #27,678

## Definitions
1. Indefatigable, untiring and not yielding to fatigue

## Etymology
From tire (“to become sleepy or weary”) + -less

## Easily confused with
- **tirelessly** (https://plainspell.com/en/vs/tireless-vs-tirelessly)
- **timeless** (https://plainspell.com/en/vs/timeless-vs-tireless)
- **tiredness** (https://plainspell.com/en/vs/tiredness-vs-tireless)

## Common misspellings (10)
`itreless`, `tierless`, `tireelss`, `tireles`, `tirelless`, `tirelses`, `tirleess`, `tirreless`, `trieless`, `ttireless`

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