# het up

> English word · Verb

## Definitions
1. simple past and past participle of heat up

## Etymology
Irregular form of heat up. The adjective was originally a metaphorical use of the past participle het up (“heated up”), perhaps as a reference to agitation caused by fever or the churn of boiling water, but has since lexicalised as a fossil in standard English.

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