the act of lifting your chin up (see Molina)
aquetzaliztli. el acto de leuantar, o alzar la cabeza. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 7r. col. 2. Thanks to Joe Campbell for providing the transcription.