Which term is synonymous with "join together"?

The term "conjoin" means to join together or to unite, making it synonymous with the phrase "join together." This word is used to describe the act of linking two or more things in a way that they become connected or integrated. In contexts such as mathematics, grammar, or general language use, "conjoin" emphasizes the process of bringing elements together to form a cohesive unit.

The other options present meanings that do not align with "join together." "Concur" refers to agreeing or having the same opinion, "commemorate" means to honor or remember an event or person, and "conceit" has to do with an excessive pride in oneself or a fanciful expression in writing or speech. Therefore, "conjoin" is the most accurate term that captures the essence of combining or joining things together.