tzaptic mitl.

Headword: 
tzaptic mitl.
Principal English Translation: 

a bolt which is shot with a crossbow (see Molina)

Alonso de Molina: 

tzaptic mitl. passador que se tira con ballesta.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 151v. col. 1. Thanks to Joe Campbell for providing the transcription.