atzacua.

Headword: 
atzacua.
Principal English Translation: 

to keep oneself apart, to isolate oneself (reflexive) (see Molina)

Orthographic Variants: 
atzaqua
Alonso de Molina: 

atzaqua. nin. (pret. oninatzacu.) aislarse.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 9r. col. 1. Thanks to Joe Campbell for providing the transcription.