the act of overlooking and observing the country or seacoast from a watchtower (see Molina)
Alonso de Molina:
yaotlachializtli. el acto de atalayar assi. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 31r. col. 2. Thanks to Joe Campbell for providing the transcription.