A tough nut to crack

We use the idiom “a tough nut to crack” to talk about problems that are difficult to solve, or to talk about people who won’t do what you want them to.

However, this video is about a nut that is really tough to crack.

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I am a director of the Learn English Network. A non-profit organisation registered in the UK dedicated to helping people learning English and people who teach English online.

Learn English 2019