缺口
quē koǔ · HSK 7
gap
🧩 缺 lack + 口 opening = a missing opening, a gap or shortfall
缺 — 缶 (jar) + 夬 (phonetic)
Originally a semantic-phonetic compound: the 缶 component depicts an earthenware jar, while 夬 supplies the sound. The character first referred to a broken or chipped pot, then broadened to mean 'lacking,' 'missing,' or 'deficient' in general.
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.