Which word means having precise relevance to the matter at hand?

The word "pertinent" means having a clear and significant relevance to the topic or matter being discussed. It suggests that something is not only related but also directly applicable to the situation at hand, making it essential for understanding or addressing the issue. For example, presenting pertinent evidence in a debate helps strengthen an argument by providing relevant information.

In contrast, the other words do not convey this sense of direct relevance. A platitude refers to a trite or meaningless statement, which lacks the significance necessary to address the matter effectively. Mollify means to soothe or calm someone’s feelings, which is unrelated to the concept of relevance. Stanza is a term used to describe a grouped set of lines in a poem, which does not pertain to the relevance of discussions or arguments at all. Thus, "pertinent" accurately captures the idea of having precise relevance.