the interjection of that who makes an exclamation (see Molina)
Orthographic Variants:
yuiyaue
Alonso de Molina:
yuiyaue. o desventura. interjection del que haze esclamacion. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 44r. col. 2. Thanks to Joe Campbell for providing the transcription.