口紅
くちべに · kuchibeni · JLPT N2 · noun
lipstick
💄 口 kuchi = mouth + 紅 beni = red, so mouth + red = lipstick
Kuchi (口) means mouth and beni (紅) means red, so kuchibeni is literally red for the mouth. Beni was also a traditional red pigment, which fits a lip color.
口 — pictograph of an open mouth
口 is one of the oldest pictographs in Chinese, originally drawn as a simple outline of an open mouth. Its core meaning 'mouth' extended naturally to 'opening' or 'entrance', as in 入口 (entrance). It also serves as a common radical in characters related to speech, eating, or apertures.