for snow to fall (see Molina)
cepayauitl uetzi. (pret. cepayauitlouetz.) neuar. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 18r. col. 2. Thanks to Joe Campbell for providing the transcription.