Idioms are expressions that would have different meanings if you took the words apart. The individual words in the idiom don’t usually help you make sense of it; you just have to know what it means. It would be helpful to do some online practice to gain a better understanding of idioms. Here are a couple examples, along with their meanings. In the dark- The actual meaning for this would be that there is no light were you are, but the meaning of the idiom is that you don’t know what’s really going on. They didn’t want her to know, so they kept her in the dark about it. Inside joke- These words don’t make much sense together, but the meaning of this idiom is that it is a joke that only certain people will understand; maybe those inside the circle of friends. Idioms are fun to read, but they’re even more fun to use in your writing. Here are a few more you can use: catch you later, say the word, hit the roof, a piece of cake.
• ELT lexis