nicca. ola, hao, oys, para llamar a alguno. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 71v. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
NICCA exclamation used for hailing someone, getting someone's attention, hola, hao, oyes, para llamar a alguno (M)[(1)Cf.124v]. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 172.
Horacio Carochi / English:
nicca = interjection 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), 507, and see 456–57 (with n7)