a tutor or teacher (male or female), a governess, a nanny; one who raises in gives instruction to children (see Molina's entry for tlacahuapauhqui)
Alonso de Molina:
teixtlamachti. ayo, o aya de alguno. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 96r. col. 2. Thanks to Joe Campbell for providing the transcription.