to be the first time that something happens (see Molina)
Alonso de Molina:
quiniyoppa. lo mesmo es que quinic ceppa. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 90r. col. 2. Thanks to Joe Campbell for providing the transcription.