expressive

(5) Expressive language and wordplay are embodied in a special word class called “expressives.” This is a basic class of words distinct from verbs, adjectives, and adverbs in that they cannot be subjected to logical negation. They describe noises, colours, light patterns, shapes, movements, sensations, emotions,…

…of speech known as an expressive or an ideophone, which refers to aesthetic aspects of the passing scene such as pattern of movement, sound, or the appearance of the object being observed. They constitute a separate part of speech since they have their own characteristic internal structure and role outside…