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Meaning of hard as nails | Babel Free

Adjective CEFR C1

Definitions

Very unsympathetic; callous
idiomatic, not-comparable
Able to endure difficulties; tough
idiomatic, not-comparable

CEFR level

C1

Advanced
This word is part of the CEFR C1 vocabulary — advanced level.

See also

hard as the nether millstone hard determinist hard done by hard handed hard hit hard knock