yetztica.

Headword: 
yetztica.
Principal English Translation: 

to be (formal variant) (see Karttunen)

Orthographic Variants: 
yetzticah
IPAspelling: 
yetstikɑh
Frances Karttunen: 

YETZTICAH This compound verb construction involving both YE and CĀ of the suppletive complex meaning ‘to be’ is used in formal speech in place of the simple verb. See the verb YE.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 339.

Lockhart’s Nahuatl as Written: 

nino. in fact virtually never in first person. yetz- irregular reflexive combining form of cah plus cah as auxiliary.
James Lockhart, Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 242.