Select the most appropriate meaning of the given idiom.

Once bitten, twice shy

An unpleasant experience induces caution

The most appropriate meaning of the idiom "once bitten, twice shy" is an unpleasant experience induces caution.

The idiom is used to describe someone who is more careful or cautious after having a negative experience. For example, you might say that someone is once bitten, twice shy after being scammed online.

The other options are not as accurate descriptions of the idiom.

• Someone who doesn't learn from his previous experiences suggests that the person is not wise or intelligent, which is not necessarily the case.
• Someone who is afraid of taking challenges suggests that the person is not brave or adventurous, which is not necessarily the case.
• To keep something precious safely is not related to the idiom "once bitten, twice shy".