# superhard

> English word · Adjective

## Definitions
1. Having a very high hardness.
2. Highly strengthened against attack.
3. Having a hardness between that of boron nitride and that of diamond.

## Etymology
From super- + hard.

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