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Region: General | Usage example: The negotiation remained a hard nut to crack.

Hard nut to crack

Meaning

Something difficult to solve.

Usage

Used for stubborn problems.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Resembling the difficulty of cracking hard nuts.

Used since the 1800s.