ilhuiz.

Headword: 
ilhuiz.
Principal English Translation: 

especially

Orthographic Variants: 
ilhuice, ilhuize
IPAspelling: 
ilwis
Alonso de Molina: 

ilhuiz. desuariadamente. o atroche moche. aduerbio, o mucho mas.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 37v. col. 1. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

ILHUIZ much more, especially / especialmente o mucho más (C)
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 104.

Horacio Carochi / English: 

ilhuiz = especially
Horacio Carochi, S.J., Grammar of the Mexican language with an explanation of its adverbs (1645), translated and edited with commentary by James Lockhart, UCLA Latin American Studies Volume 89 (Stanford: Stanford University Press, UCLA Latin American Center Publications, 2001), 503, and see 416–17 (with n1)