Which term means to agree?

The term that means to agree is "concur." It is derived from the Latin word "concurrere," which means to run together or to agree in opinion or to have the same view. This term is commonly used in discussions where parties share similar thoughts or conclusions, indicating alignment and agreement on a particular matter or decision.

In contrast, the other terms do not convey the notion of agreement. "Conjoin" means to join together, which indicates a merging or connection rather than a mutual agreement. "Commemorate" refers to honoring or remembering someone or something, typically in a celebratory or reflective manner, and does not imply agreement. "Conceit" describes an excessively favorable opinion of one's own ability, importance, or wit, and is more focused on self-regard than on any form of consensus or agreement with others.