Phrase guide

tough as nails

adj · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

adj

Meaning 1

Having a hard, strong, and determined mindset.

Definition source: English Wiktionary via Wiktextract

Usage: idiomatic, not-comparable

Qualifier: simile

Examples

  • Near-synonyms: hardcore, diehard, steely-spined, steely-nerved, steely-eyed, steely, flinty

Meaning relationships

Synonyms: tough as teak, tough as old boots, hard as nails, hardcore, diehard, steely-spined, steely-nerved, steely-eyed, steely, flinty

Antonyms: none provided

2

adj

Meaning 2

Very tough.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Qualifier: simile

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: tough as teak, tough as old boots

Antonyms: none provided

History

Etymology

No etymology was provided for this word.

Across languages

Translations

1 source translations are retained for this English entry.

  • French: dur(e) à cuire — having a determined mindset