the act of coming up from the depths of the water to the surface (see Molina)
Orthographic Variants:
ualpauechiliztli, hualpauechiliztli
Alonso de Molina:
ualpauechiliztli. el acto de salir delo profundo del agua a encima della. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 154v. col. 2. Thanks to Joe Campbell for providing the transcription.