Which word describes communication that is brief and to the point?

The word that describes communication that is brief and to the point is "terse." When someone communicates in a terse manner, they use very few words, often stripping away any unnecessary details, to convey their message succinctly. This style can be effective in situations where clarity and brevity are valued, such as in professional or urgent communications.

The other choices describe different qualities that do not align with the concept of brevity in communication. "Unremitting" refers to something that is relentless or not letting up, "precarious" describes a situation that is uncertain or risky, and "surreptitious" pertains to actions that are secretive or stealthy. None of these terms relate to the notion of being concise or straightforward in communication.