A metaphor is a figure of speech that compares two different things by stating one is the other to imply a resemblance or analogy between them. It is used to add vividness and depth to writing by creating a connection between the two things being compared.
It seems there may be a typographical error in your question. If you meant "metaphor," a metaphor is a figure of speech that makes a comparison between two things that are unrelated but share some common characteristics. It is often used to create a vivid image or convey a deeper meaning.
Metophere Hydrophere