隅 is a bound form (b.f.), meaning it only appears as part of compound words, not independently. It carries the sense of a corner, nook, or remote place, and can extend metaphorically to mean 'side' or 'aspect'. You'll encounter it in literary or formal contexts, in words like 一隅 (a corner/part), 海隅 (remote coastal area), and 向隅 (to be disappointed, lit. 'facing the corner').