English · Idiom Candidate

hard as iron

Proposed by a contributor, not yet supported by evidence.

Meaning · English

very hard

Where it’s used: Used American English

The Torah notes that a teacher of the law must be as hard as iron.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Common questions

What does “hard as iron” mean?

very hard

Is “hard as iron” formal or informal?

No register label has been reviewed yet — treat it as neutral and check the usage notes above.

👁 Views 0 today 0 past 7 days 0 this month 0 all time