to go along with a song and be well toned (see Molina)
IPAspelling:
semonotiw
Alonso de Molina:
cemonotiuh. (pret. ocemonotia.) yr el canto ygual y bien entonado. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 16v. col. 1. Thanks to Joe Campbell for providing the transcription.