Shadows dance wildly.
Meaning: This means that the shadows are moving in a lively and rhythmic way, as if they are dancing, in an uncontrolled or chaotic manner. It's like saying, The shadows are moving in a way that is not controlled and is very lively.
Choice of Words: Shadows are areas of darkness created by an object blocking light. Dance is a verb that means to move in a lively or rhythmic way. Wildly is an adverb that means in a way that is uncontrolled or chaotic.
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Related Expressions