enamel

(noun) hard white substance covering the crown of a tooth. Synonyms: tooth enamel.

(noun) a colored glassy compound (opaque or partially opaque) that is fused to the surface of metal or glass or pottery for decoration or protection.

(noun) a paint that dries to a hard glossy finish.

(noun) any smooth glossy coating that resembles ceramic glaze.

(verb) coat, inlay, or surface with enamel.