the ensnarer or waylayer of one who watches or notices what is being done (see Molina)
Alonso de Molina:
ichtaca tlachiani. assechador assi. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 32v. col. 2. Thanks to Joe Campbell for providing the transcription.