catch someone off guard

Meaning: To surprise someone who is not prepared.

Language: English

Literally: (Already vivid in English)

Example: “The question about his salary caught him off guard.”

Category: Daily Life

Origin: From fencing and boxing, where "guard" is the defensive position. The phrase is common from the 19th century.

Equivalents in other languages

More idioms — Daily Life

More English idioms

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