顔付き
かおつき · kaotsuki · JLPT N1 · noun
facial expression
🎭 顔 (kao, face) + 付き (tsuki, attached): the look that is attached to the face
付き (tsuki) means attached or with, as in 砂糖付き (with sugar). So 顔付き is the expression that comes with a face.
付 — person radical 亻 + hand 寸
付 originally pictured a hand (寸) reaching out to hand something to a person (亻), depicting the act of giving or delivering. The core sense 'to hand over, deliver, pay' has remained stable since ancient bronze inscriptions. It also serves as a phonetic component in characters like 附, 符, and 府.