to be reckless or to become hotheaded (see Molina)
Orthographic Variants:
iliuiz tequaltiani, ilihuiz tequaltiani
Alonso de Molina:
iliuiz tequaltiani. atronado o descalabazado. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 37v. col. 1. Thanks to Joe Campbell for providing the transcription.