to have something as a custom; to do something often
Orthographic Variants:
zan ic niyauh, çan ic niyauh, çanic niyauh
Alonso de Molina:
zanic niyauh. tener algo por costumbre, o hazer amenudo algo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 14r. col. 2. Thanks to Joe Campbell for providing the transcription.