ciuanacayo. hombre delicado. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 22v. col. 1. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
–CIHUĀNACAYŌ. necessarily possessed form one's female genitals / vulva, vagina (S) [(I)CF.83r]. M has ciuanacayo 'weak, effeminate man,' which probably represents CIHUĀNACAYOH. S gives this with an absolutive suffix, but C has it only in possessed form. See CIHUĀ-TL, NAC(A)-TL. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 34.