puñal (Classical Nahuatl) comes from Spanish puñal, from Vulgar Latin pugnalis, from Latin pūgnus, from Proto-Italic pugnos, from Proto-Indo-European puǵnos, from Proto-Indo-European pewǵ- — to punch, fist-fight; to prick, poke, stab.
puñal (Classical Nahuatl): dagger