at such time, or at this time (adverb) (see Molina)
Alonso de Molina:
immani. atal hora, o aesta hora. aduerbio. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 38r. col. 1. Thanks to Joe Campbell for providing the transcription.