nononcua.

Headword: 
nononcua.
Principal English Translation: 

separately; one at a time; each thing by itself, each thing on its own (see Molina)

Orthographic Variants: 
nononqua
Alonso de Molina: 

nononqua. cada cosa porsi aparte, o cada vno porsi aparte. aduerbio.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 73v. col. 1. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

at nononqua in quen qujmonequjltiz, at nononqua, ceceiaca in amechmolnamjqujliz, in amechmotlatiliz, in amechmotzatzililiz = Perhaps [our lord] will determine in a separate manner for each. Perhaps separately, one at a time, he will remember you, hide you, call out for you [mother or child] (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 6 -- Rhetoric and Moral Philosophy, No. 14, Part 7, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1961), 194.