Which of the following words refers to a brief, yet effective expression?

The term "terse" describes a style of expression that is brief and to the point, often conveying meaning with a minimum of words. This conciseness can enhance clarity and impact, making a statement more powerful without unnecessary embellishments. In contexts such as writing or speech, being terse allows for direct communication, which can be particularly valuable in situations where clarity and efficiency are essential.

The other options provided do not align with the description of being brief yet effective. "Tenacious" refers to holding firm or persistently to a course of action, "unremitting" implies something that is relentless or never-ceasing, and "exuberant" conveys a sense of enthusiasm and lively energy. While these words express strong characteristics, they do not capture the essential quality of brevity combined with effectiveness that defines "terse."