something smooth, bare, bald (see Karttunen and Molina)
IPAspelling:
ʃiːpetstik
Alonso de Molina:
xipetztic. cosa lisa. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 159r. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
XĪPETZTIC something smooth, bare, bald / cosa lisa (M), pelado, encuerado (T) [(2)Tp.123,246]. See XĪPETZOĀ. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 325.