in icuac onyez.

Headword: 
in icuac onyez.
Principal English Translation: 

an when it would happen that... (see Molina)

Orthographic Variants: 
iniquac onyez, in iquac onyez, inicuac onyez
Alonso de Molina: 

iniquac onyez. y quando ouiere que.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 39r. col. 1. Thanks to Joe Campbell for providing the transcription.