expression
red lips and pearly white teeth (said of beautiful women)
A classical yojijukugo used to describe a beautiful woman's features. Rare in modern conversation; mostly found in literary or poetic contexts.
その絵には朱唇皓歯の女性が描かれている。
The painting depicts a woman with red lips and pearly white teeth.
A yojijukugo of Chinese origin, combining 朱 (vermilion), 唇 (lips), 皓 (bright/white), and 歯 (teeth). The exact historical derivation is uncertain, but it follows classical Chinese poetic conventions for describing feminine beauty.