something that tires someone, makes that person tired (see Molina)
Alonso de Molina:
teciammicti. cosa que haze cansar a otro. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 92v. col. 1. Thanks to Joe Campbell for providing the transcription.