内衣
nèi yī · HSK 6
undergarment
👙 内衣 = inside + clothing — the layer worn inside
内 means inside or inner, 衣 means clothing or garment. Together they literally describe the clothing worn on the inside layer, closest to your body — underwear.
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').