to fight, battle or to struggle with another (see Molina)
Alonso de Molina:
mayztlacoa. nite. (pret. onitemaiztlaco.) luchar con otro. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 51v. col. 1. Thanks to Joe Campbell for providing the transcription.