apuñalar
/apuɲaˈlaɾ/ · B1 · verb
to stab (to pierce or to wound with a pointed tool or weapon, especially a knife or dagger)
🗡️ a + puñal (dagger) + ar: to dagger someone; puñal comes from puño, fist
Puñal is a dagger, a blade small enough to grip in your puño (fist). Both come from Latin pugnus, fist, which also gave English pugnacious and poniard. Apuñalar literally means to go at someone with a fist-dagger.