Choose the correct meaning of the following idiom:

At one's wit's end

perplexed

The correct meaning of the idiom "at one's wit's end" is perplexed.

The other options are incorrect. "Clear up" means to make something understandable or easy to understand. "Explain" means to give a detailed account of something. "Enlighten" means to give someone new knowledge or understanding.

The idiom "at one's wit's end" means to be completely puzzled or confused. It is often used to describe someone who is trying to solve a problem or figure something out, but they are so frustrated that they don't know what to do next. For example, if you are trying to solve a difficult math problem and you can't seem to figure it out, you might say that you are "at your wit's end."