zannenhuetzi.

Headword: 
zannenhuetzi.
Principal English Translation: 

in vain (see Molina)

Orthographic Variants: 
zan nen huetzi, zannen huetzi, zannen uetzi, zan nen uetzi, çannen uetzi, çannen huetzi, çannenhuetzi, çanenuetzi, çanenhuetz, çanenvetzi
Alonso de Molina: 

çanenvetzi. Envano.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 1, Spanish to Nahuatl, p. 56r.

zannen uetzi. (pret. zannen ouetz.) cosa sin dicha.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 14v. col. 1. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

Seems to combine zannen (in vain) with huetzi (to fall). (SW)