秘密成语怎么说英语

The English equivalent of the Chinese idiom "秘密成语" is "secret idiom". An idiom is a phrase or expression that has a figurative meaning, which is different from the literal meaning of the individual words that make up the idiom. For example, the English idiom "to take the bull by the horns" means to face a difficult situation head-on, even if it is dangerous or scary. In the case of a "secret idiom", the meaning of the idiom is not widely known or understood, and may be known only to a small group of people.