to pant, pass gas, or take a breath, or to shine and look good with clothes (see Molina)
Alonso de Molina:
ihiotia. nin. (pret. oninihioti.) resollar, o peerse, o tomar aliento, o resplandecer y luzir con ricas vestiduras. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 36v. col. 1. Thanks to Joe Campbell for providing the transcription.