Usually means: Extremely tough, resilient, and determined.
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We found 7 dictionaries that define the word hard as nails:

General (5 matching dictionaries)
  1. hard as nails: Merriam-Webster
  2. hard as nails: Oxford Learner's Dictionaries
  3. hard as nails: Collins English Dictionary
  4. hard as nails: Wiktionary
  5. Hard as Nails: Dictionary of Phrase and Fable (1898)

Miscellaneous (1 matching dictionary)
  1. hard as nails: Idioms

Slang (1 matching dictionary)
  1. hard as nails: English slang and colloquialisms used in the United Kingdom

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Definitions from Wiktionary (hard as nails)

▸ adjective:  (simile, idiomatic) Very unsympathetic; callous
▸ adjective:  (simile, idiomatic) Able to endure difficulties; tough

Similar:
hard as the nether millstone, obdurate, hard as iron, hard as a rock, hard-nosed, hard-ass, hard-fisted, bone hard, hard, iron-hearted, more...

Phrases:
hard tough as nails, as hard as nails, more...

▸ Words similar to hard as nails

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▸ Idioms related to hard as nails

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▸ Popular nouns described by hard as nails

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▸ Rhymes of hard as nails

▸ Invented words related to hard as nails

Similar:
hard as the nether millstone, obdurate, hard as iron, hard as a rock, hard-nosed, hard-ass, hard-fisted, bone hard, hard, iron-hearted, more...

Phrases:
hard tough as nails, as hard as nails, more...



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