one who detains another person so that he or she cannot leave; or, one who examines broken or dislocated bones (see Molina)
Alonso de Molina:
tezalo. el que detiene a otro paraque no se vaya, o concertador de huessos quebrados o desconcertados. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 91v. col. 1. Thanks to Joe Campbell for providing the transcription.