to conjure against someone, or to say bad things about someone, gossiping (see Molina; tentative English translation here by Stephanie Wood)
Alonso de Molina:
teca ninonotza. (pret.) teca oninonotza. coniurar contra alguno, o dezir mal y murmurar de otro. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 91v. col. 2. Thanks to Joe Campbell for providing the transcription.