keen

Keen is an English adjective meaning having or showing eagerness, sharpness of intellect, or a heightened sense of perception. It can describe a strong interest, quick understanding, or a physically sharp edge or sound, as in a keen mind or a keen blade. The term is used across many contexts to convey intensity or acuity.

Keen, Inc. is an American footwear and outdoor equipment company best known for its sandals and boots with protective toe guards. The brand emphasizes rugged, outdoor-ready designs and has distributed its products worldwide.

Keen Software House is a Czech video game developer known for Space Engineers, a voxel-based sandbox game focused on space exploration, construction, and survival. The studio released the title in the 2010s and has continued to support it with updates and expansions.

Commander Keen is a classic PC video game series from id Software. The first episode, released in 1990, follows a young space-faring hero as he faces alien threats, and the games are noted for helping popularize the platformer genre on personal computers.

Keen is also a surname and given name, used by various people and in fictional works.