ayaic.

ayaic. aun nunca. aduerbio.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 3r. col. 2. Thanks to Joe Campbell for providing the transcription.

AYAĪC never yet, never until now / nunca hasta ahora (C) See AYA, AĪC, YA.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 16.

ayaīc = never until now
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), 376–77 (with n8), 498.