A Tough / Hard Nut (to Crack) — Meaning, Usage & Examples

What it means...

A person or problem that is very difficult to deal with or figure out.

When someone is a tough nut to crack, they are hard to persuade, understand, or get close to.

When a situation is a tough nut to crack, it involves a challenging problem with no easy solution.

Use it when…

When someone is difficult to negotiate with because they rarely change their position
When a technical or business problem resists all the solutions you have tried
When someone is emotionally guarded and difficult to get to know personally

Don’t confuse with...

"Hard to Please"

—

Someone with very high expectations who is rarely satisfied with what they receive

"Tough Cookie"

—

A strong, resilient person who is not easily upset or pushed around

"A Tough / Hard Nut (to Crack)"

—

A person or problem that is very difficult to handle or solve

Where you’ll hear it

You’ll hear the "A Tough / Hard Nut (to Crack)" idiom in real life — at work, in relationships, or in the media.

Work & Business

Negotiation

A sales director warns a junior rep that the new corporate client is a tough nut to crack and requires patience.

Relationships & Social Life

Emotional Situations

A friend says her partner's father is a tough nut to crack but is slowly warming up to her.

Media & Everyday Life

News

A journalist describes the regulatory approval process as a tough nut to crack for new fintech companies.

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Use it like this

Here’s how to use "A Tough / Hard Nut (to Crack)" idiom naturally in real conversations, with real examples.

Work & Business

Talking to Colleague

Colleague

How did the call with the new client go?

You

He's a tough nut to crack — very guarded, but I think we made progress.

Relationships

Problem-solving

Boss

Has anyone found a solution to the sync issue in the database?

You

Not yet — it's a tough nut to crack, but we're getting closer.

Everyday Conversations

Honest Conversations

Friend

Your new flatmate seems very distant — is she always like that?

You

She's a tough nut to crack, but I think once she opens up, she'll be great.

‹›

Last updated:

April 20, 2026

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