# loosen up

> English word · Verb

## Definitions
1. To become loose; to loosen; to relax (a muscle, etc.).
2. To relax; to act less seriously.

## Etymology
Compare Old Norse leysa upp (“loosen up”).

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