cuacuauhti.

quaquauhti. ni. (pret. oniquaquauhtiz vel. oniquaquauhtic.) lo mismo es que quaquappitzaui.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 85v. col. 1. Thanks to Joe Campbell for providing the transcription.

For the gloss M refers from quaquauhti to quaquappitzaui but the latter does not occur in M, and the gloss is to be found with unreduplicated quappitzaui.