to be absent (see Molina, who gives this in the first person plural)
Alonso de Molina:
ataque. estar nosotros ausentes. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 7v. col. 1. Thanks to Joe Campbell for providing the transcription.