- A difficult problem to solve or a person who is difficult to understand, persuade, or deal with.
Explanation
Origin
- This idiom is based on the literal difficulty of cracking the shell of certain nuts (like walnuts or Brazil nuts) to get to the kernel inside.
- It dates back to at least the 1700s.
- The effort required to break the shell is compared to the effort needed to solve a tough problem or understand/influence a stubborn or reserved person.
Synonyms & Related Expressions
Alternatives
For Problems:
Slang/Informal:
- Standoffish (Reserved and unfriendly)
- A brick wall (Impossible to get through to)
- Plays their cards close to their chest (Doesn't reveal intentions)
Milder/Standard:
- Reserved
- Difficult to persuade
- Stubborn
- Uncommunicative
- Hard to read
For People:
Situational Appropriateness
- Informal to neutral.
- Generally acceptable in most contexts, including business, as long as the tone is appropriate.
- Calling a person this directly might be seen as slightly critical, depending on context.
Misunderstanding Warnings
- Unlikely to be misunderstood, as the metaphor is fairly intuitive.
Examples
- This math problem is a hard nut to crack.
- The new CEO is friendly, but she's a hard nut to crack when it comes to changing her mind.
- Getting him to talk about his feelings is like trying to crack a hard nut.
Dialogue
Manager A: How's the negotiation going with the new client?
Manager B: Slowly. Their lead negotiator is a hard nut to crack. Very experienced, doesn't show her cards.
Manager A: Keep at it. Persistence might pay off. Let me know if you want to brainstorm strategies.
Manager B: Thanks, I might take you up on that.
Social Media Examples
- Post: Trying to debug this code... it's proving to be a hard nut to crack! Any #programming wizards have tips for dealing with [specific issue]? #coding #developer
- Tweet: My toddler's picky eating phase is a hard nut to crack. One day loves broccoli, the next day throws it! #parenting #toddlerlife
- Forum Comment: Getting funding approved through that committee is notoriously a hard nut to crack.
Response Patterns
When describing a problem as a hard nut to crack:
- Agreement/Shared struggle: Tell me about it! I'm stuck too. / Yeah, it's really tough.
- Offering help: Maybe we can figure it out together?
- Suggesting a different approach: Have you tried looking at it this way?
When describing a person as a hard nut to crack:
- Agreement: I know, right? Very reserved. / He definitely doesn't give much away.
- Sharing experiences: I found that too when I tried to...
- Offering advice (less common): Maybe try approaching him about...
Common Follow-up Questions/Actions
After identifying a problem as a hard nut to crack:
- Discussing potential solutions or strategies.
- Deciding to take a break or seek help.
After identifying a person as a hard nut to crack:
- Discussing strategies for dealing with them.
- Sharing anecdotes about interactions.
- Expressing frustration or admiration for their resolve.
Conversation Starter
- No.
- Used to describe a specific problem or person currently being discussed.
Intonation
- Stress usually falls on hard and nut.
- Can be said with frustration (about a problem) or a mix of respect and difficulty (about a person).
- This problem is a HARD NUT to crack.
- She's a HARD NUT to crack.
Generation Differences
- Widely understood and used across generations.
Regional Variations
- Common in all major English-speaking regions.