# restrainer

> English word · Noun · IPA /ɹɪˈstreɪnɚ/

## Definitions
1. Something that restrains.
2. A chemical compound (such as potassium bromide), added to a developer to prevent fogging.

## Etymology
From restrain + -er.

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