to become fond of something, or to find to be good with it (see Molina)
Alonso de Molina:
itech ninomati. itech oninoma. aficionarse a algo, o hallarse bien con ello. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 42v. col. 1. Thanks to Joe Campbell for providing the transcription.