occencaye. mayormente, o especialmente. aduerbio. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 74v. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
OCCENCAHYEH principally, especially / mayormente o especialmente (M) [(1)Cf.87r]. See OCCENCAH, -YEH. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 175.