tzinco.

Headword: 
tzinco.
Principal English Translation: 

anus (see Karttunen)

Orthographic Variants: 
tzīnco
IPAspelling: 
tsiːnko
Frances Karttunen: 

TZĪNCO pl: -MEH anus / ano (X) [(2)Xp.97]. See TZĪN-TLI, -C(O).
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 312.