to advise and let someone know about something that would benefit him or her, owing to the love that one feels for that person (see Molina)
Alonso de Molina:
tlamatzoa. ni. (pret. onitlamatzo.) aduertir y auisar a otro de alguna cosa que le conuiene, por el amor que le tiene. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 126r. col. 1. Thanks to Joe Campbell for providing the transcription.