# case-hardened

> English word · Adjective

## Definitions
1. Of metal: harder at its surface, due to a case hardening process.
2. Hardened by experience.

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