-po.

-POH a necessarily possessed form, one's equal, another like oneself / su igual, o su compañero (M), igualidad o semejanza (C) This is abundantly attested in C, R, and P. Modifying elements may intervene between the possessive prefix and the verb, NOPOH 'my equal, someone like me’, NOTLĀCAPOH 'a human being like myself,’ NOCNŌPOH 'someone poor like me.' This can be thought of as a preterit-as-present verb of the irregular type which takes possessive rather than subject prefixes and occurs only in singular form, in which case, it implies *POĀ 'to be, become like someone' S has absolutive potli, but it is nowhere attested in the sources for this dictionary.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 200–201.