Which term refers to an unnecessary addition?

The term that refers to an unnecessary addition is "superfluous." In the context of language and communication, superfluous describes something that exceeds what is sufficient or required, often leading to excessiveness that is not needed. For example, when writing or speaking, superfluous phrases or details may clutter the main message, making it less clear and effective.

In contrast, "pragmatic" relates to practical considerations and approaches that are based on practical rather than theoretical ideas, making it unsuitable for describing something unnecessary. "Requisite" indicates something that is necessary or required for a particular purpose, clearly the opposite of unnecessary. "Essential" signifies something that is absolutely necessary or fundamental, which is in direct contradiction to the idea of being superfluous. These distinctions highlight why "superfluous" is the correct choice to describe an unnecessary addition.