狭小
xiáxiǎo · HSK 7
narrow and small
狭 = narrow + 小 = small; the compound literally stacks narrow onto small
狭 (xiá) means narrow and 小 (xiǎo) means small, so 狭小 is the two cramped ideas joined: a space that is both narrow and small. The xiǎo half rhymes with the whole word's second syllable, an easy verbal anchor.
小 — three small strokes around a central vertical
小 is a pictograph originally showing three tiny dots or specks, suggesting small particles or grains. Over time the dots became stylized strokes flanking a central line. The core meaning 'small' has stayed remarkably stable from oracle bone script to today.