for it to be cold, as in the weather (see Molina)
ceuatoc. (pret. oceuatoya .l. oceuatoca.) hazer frio. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 18v. col. 1. Thanks to Joe Campbell for providing the transcription.