In kaʾanna munawwaran, the whiteness of a blossom corresponds to the brightness of teeth. Ḥurr al-raml evokes fine, clean sand, while lahu nadī adds freshness or moisture.
This is more involved than the commonplace 'teeth like pearls': the smile introduces movement, almā supplies a dark background, and flower and sand provide a natural visual model. A brief smile becomes a layered sensory image.