Which phrase means to work alongside each other?

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Study for the SAT Vocabulary 2025 Test. Master vocabulary with flashcards and questions, each with detailed explanations. Get ready for your exam!

The phrase "in tandem" signifies working alongside each other harmoniously or cooperatively. It originates from a term describing two horses harnessed together for pulling a carriage, highlighting the idea of collaboration and joint effort. When individuals or teams work in tandem, they synchronize their efforts to achieve a common goal or complete tasks effectively together.

In contrast, the other choices convey different meanings. "In unison" refers to doing something simultaneously or in agreement, while "at odds" suggests a disagreement or conflict, and "in isolation" indicates being separate or alone. These terms do not capture the essence of working together as effectively as "in tandem."