the act of putting one's ear forward when trying to hear, or to try to capture what is being said (see Molina)
Alonso de Molina:
nenacaz quetzaliztli. inclinamiento dela oreja para oyr o asechar lo que se habla. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 67v. col. 2. Thanks to Joe Campbell for providing the transcription.