内
nèi · HSK 3
inside
📦 内 = 入 (enter) + 冂 (boundary): what's entered inside an enclosure
The character 内 combines 入 (to enter) within 冂 (an enclosure or borders), giving the sense of 'inside'. Common in compounds like 内部 (interior) and 国内 (domestic, within the country).
内 — enclosure 冂 + enter 入
内 originally depicted something entering (入) into an enclosed space (冂), giving the core sense of 'inside' or 'within'. The pictographic image of going into a covered area extended naturally to meanings like inner, internal, and inland. It contrasts with 外 ('outside').