iyana. nitla. (pret. onitlaiyan.) esconder algo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 36v. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
(I)HYĀN(A) vrefl,tv to hide, conceal oneself; to hide, conceal, deny something / se esconde, se oculta (T), lo esconde, lo niega, lo oculta (T), esconder algo (M) [(7)Tp.150,188]. (I)HYĀNILIĀ applic (I)HYĀN(A) (I)HYĀNALŌ nonact. (I)HYĀN(A) Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 102.