to be thrown headfirst into the water, or to be thrown over a cliff (see Molina)
Orthographic Variants:
iquauic tlaquetztli, iquahuic tlaquetztli
Alonso de Molina:
iquauic tlaquetztli. echado de cabeza enel agua, o despeñado desta manera. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 42r. col. 2. Thanks to Joe Campbell for providing the transcription.