# sleepless

> English word · Adjective · IPA /ˈsliːpləs/ · frequency rank #23,104

## Definitions
1. Characterized by an absence of sleep: wakeful.

## Etymology
From Middle English slepeles, from Old English slǣplēas; equivalent to sleep + -less.

## Easily confused with
- **sleeveless** (https://plainspell.com/en/vs/sleepless-vs-sleeveless)
- **sleepiness** (https://plainspell.com/en/vs/sleepiness-vs-sleepless)

## Common misspellings (12)
`lseepless`, `selepless`, `sleelpess`, `sleepelss`, `sleeples`, `sleeplless`, `sleeplses`, `sleeppless`, `slepeless`, `slepless`, `slleepless`, `ssleepless`

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