-nacazcoyoc.

Headword: 
-nacazcoyoc.
Principal English Translation: 

one's hearing (see Karttunen), a necessarily possessed form

IPAspelling: 
-nɑkɑskoyok
Frances Karttunen: 

-NACAZCOYOC a necessarily possessed form, one's hearing / su oído, su auditivo (Z) [(2)Zp.91,160]. M has the necessarily possessed locative form nacazco 'in one's ears.' See NACAZ-TLI, COYOCTLI.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 156.