The idiomatic expression "a tough nut" describes someone who is resilient, unyielding, and difficult to persuade or influence. It can also refer to a problem or situation that is particularly challenging to resolve.
The origin of the phrase likely stems from the literal difficulty in cracking open a hard-shelled nut. The analogy transferred to people who are similarly hard to "crack" or break down.
The register is generally neutral, suitable for both informal and formal contexts, although excessive use might sound slightly colloquial in very formal settings.
"A tough nut" can be used flexibly in sentences. You can modify it with adverbs like "really a tough nut" or adjectives like "one tough nut." It can also be negated: "He's not a tough nut at all." Questions are also possible: "Is she a tough nut to crack?"
It sounds unnatural to use the phrase in overly literal contexts. For instance, saying "This walnut is a tough nut" in a discussion about actual nuts would be technically correct but miss the idiomatic nuance. Avoid mixing the literal and figurative meanings in a confusing way.
These examples are sourced from a tough nut on Ludwig.guru.
"She's a tough nut." — The New Yorker
""It's a tough nut to crack"". — The New York Times
"Ralph is a tough nut to crack." — The New York Times - Health
"Bibi is a tough nut to crack." — The Guardian - Opinion
"As mysteries go, this wasn't a tough nut to crack." — The Washington Post
Examples sourced from https://ludwig.guru/s/a+tough+nut
| Phrase | Context |
|---|---|
| a hard case | Describes someone difficult to help or understand. |
| a tough cookie | Similar meaning, implying resilience and determination. |
| a difficult customer | Specifically refers to someone hard to please in a commercial context. |
| an uphill battle | Describes a challenging situation or task. |
| a thorny issue | Refers to a complex and sensitive problem. |
| a challenge | A more general and neutral term for something difficult. |
| a hard nut to crack | Very close synonym, often interchangeable. |
Learners often mistake this idiom for a literal description, misunderstanding its figurative meaning of a person or problem that is stubborn or hard to influence.
| Expression | Idiomatic Meaning | Register | Avoid In |
|---|---|---|---|
| a tough nut | A person who is stubborn or a problem that is difficult to solve. | Neutral | Overly formal or literal contexts. |
"A tough nut" is almost always used figuratively, to describe a person's character or a difficult situation. While you could technically use it to describe a literal nut that's hard to crack, it would sound unusual and miss the idiomatic meaning.
"A tough nut" and "a hard nut to crack" are very close in meaning and are often used interchangeably. "A hard nut to crack" emphasizes the difficulty in solving a problem or influencing someone, while "a tough nut" can also highlight the person's resilience and unyielding nature.
To avoid misusing "a tough nut," remember that it's a figurative expression, not a literal description. Don't use it when you're simply talking about actual nuts. Instead, use it to describe someone stubborn or a challenging problem, and be mindful of the context to ensure it fits appropriately.
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