歯黒め

Noun

 * 1) blackening of teeth; an ancient Japanese custom in which both men and women would blacken their teeth
 * 2) * c. 11th century: Tsutsumi Chūnagon Monogatari, "Mushi Mezuru Himegimi"
 * 眉さらにぬき給はず、歯黒め、さらにうるさし、きたなしとて、つけ給わず、いと白らかにゑみつゝ