"Take a dive" is a phrase commonly used to describe a sudden and significant fall in performance, quality, or popularity. It is often associated with sports, business, or entertainment industries. While the phrase itself has a negative connotation, there are several synonyms that can be used to convey the same idea in a more nuanced and descriptive manner. These synonyms include: plummet, decline, drop, sink, crash, slide, decrease, slump, falter, and tumble. Each of these words carries a slightly different meaning and can be used depending on the context and severity of the situation.