tencualac mitl.

Headword: 
tencualac mitl.
Principal English Translation: 

a poisoned arrow or dart (with a poison from plants) (see Molina)

Orthographic Variants: 
tenqualac mitl
Alonso de Molina: 

tenqualac mitl. saeta eruolada o con ponzoña.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 99v. col. 1. Thanks to Joe Campbell for providing the transcription.