to knock someone hard in the face (transitive); or to hit oneself in the face (intransitive)
Alonso de Molina:
ixtlatzinia. nin. (pret. oninixtlatzini.) darse de bofetadas. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 48r. col. 2. Thanks to Joe Campbell for providing the transcription.
ixtlatzinia. nite. (pret. oniteixtlatzini.) abofetear a otro. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 48r. col. 2. Thanks to Joe Campbell for providing the transcription.