to be keen on something, or to become habituated in something (see Molina)
Alonso de Molina:
itla itech ninomati. itla itech oninoma. aficionarse a algo, o abituarse a alguna cosa. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 43r. col. 1. Thanks to Joe Campbell for providing the transcription.