student asking question

What does "hurt" mean here? Is "can't hurt" an idiom?

teacher

Native speaker’s answer

Rebecca

You're right! "It can't/won't hurt" is an informal expression used to mean that doing [verb] will not be harmful or cause anything bad to happen. Ex: A: Should I ask her for a job? B: It can't hurt. Ex: Even if you're not qualified for the job, it wouldn't hurt to apply.

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