# waterfast

> English word · Adjective

## Definitions
1. watertight
2. waterproof

## Etymology
From water + fast. Cognate with Scots wattirfast (“watertight”), West Frisian wetterfêst (“waterproof”), Dutch watervast (“waterproof”), German wasserfest (“waterproof”), Danish vandfast (“waterproof”), Swedish vattenfast (“waterproof”).

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