coarse

The word "coarse" describes anything that lacks fineness, smoothness, or refinement. Originally, the term was used primarily for the texture of materials—think of rough fabrics like burlap or coarsely ground grains like cornmeal. You might describe sand as coarse if its particles are large and gritty, contrasting with the fine, soft powder of some beach sands. For example: "The coarse wool sweater scratched uncomfortably at her skin."

However, "coarse" is not limited to physical textures. It frequently describes behavior, language, or manners that are crude, vulgar, or lacking in sensitivity. A coarse joke is one that is vulgar, tasteless, or lowbrow (whether or not it is meant to offend). Similarly, someone with a coarse personality might be blunt and insensitive to the social graces or the feelings of others. "His coarse remarks at the gala offended several of the guests."

Historically, the word likely evolved as a variation of "course," suggesting something "ordinary" or "of the common course"—and therefore lacking in superior quality or polish. It implies a lack of sophistication, whether in material, action, or expression.

You can use it to describe almost anything that isn't subtle or refined: a coarse drawing with thick, heavy lines; a coarse filter in a machine that only catches large debris; a coarse adjustment that moves in big, imprecise steps; or even a coarse voice that sounds raspy and harsh. If something feels rough to the touch, sounds grating to the ear, or seems lacking in grace, it is likely coarse.