xixixa.

Headword: 
xixixa.
Principal English Translation: 

to urinate (see Karttunen)

Orthographic Variants: 
xixīxa
IPAspelling: 
ʃiʃiːʃɑ
Frances Karttunen: 

XIXĪX(A) vrefl to urinate / orinar [(2)Zp.92,175]. In both attestations the vowel of the first syllable is short. redup. XĪX(A).
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 327–328.