to be a glutton, practice gluttony (see Molina and Karttunen)
IPAspelling:
ʃihʃikwinoɑː
Alonso de Molina:
xixicuinoa. nitla. (pret. onitlaxixicuino) glotonear. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 159v. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
XIHXICUINOĀ to practice gluttony / glotonear (M) [(1)Bf.11v]. B does not attest the glottal stop, but C does in the related noun XIHXICUINYŌ-TL ‘gluttony.’ Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 324.