quequexquic. cosa que da comezon. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 89r. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
QUEQUEXQUIC something that causes an itch / cosa que da comezón (M) [(1)Tp.177]. See QUEQUEXQUIYA. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 209.