I leave to go some place (see Molina); the verb ehua is conjugated here in the first person singular
Orthographic Variants:
neua
Alonso de Molina:
neua. (pret. oneuac.) partirme para alguna parte. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 71r. col. 1. Thanks to Joe Campbell for providing the transcription.