for a woman to have her monthly period arrive (see Molina)
Orthographic Variants:
ezuitum
Alonso de Molina:
ezuitum. n. (pret. onezuitun.) venir ala muger su costumbre. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 29v. col. 2. Thanks to Joe Campbell for providing the transcription.