A metaphor is a figure of speech that describes an object or action in a way that isn't literally true, but helps explain an idea or make a comparison. ... A metaphor states that one thing is another thing. It equates those two things not because they actually are the same, but for the sake of comparison or symbolism.
What book are you doing it on
Does this word describe something?
What in the sentence does this word describe?
How does it add something important to the story?