-cihuayo.

-CIHUĀYŌ female genital secretions / secreción de los órganos sexuales de la mujer (S for cihuaayotl) [(1)Cf.83r]. S gives this with a double vowel medially and an absolutive suffix and analyzes it as a compound of CIHUĀ-TL and ĀYŌ-TL. But C has this in a section with -OQUICHYŌ, ‘semen,’ both apparently inalienably possessed forms of the corresponding nouns, although it is not impossible that –YOH is intended. M also has cihuayotl ‘vulva.’ See CIHUĀ-TL, -YŌ.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 35.