You shall tear down their altars, smash their pillars, burn their asherim with fire, cut down the graven images of their gods, and destroy their name from that place.
English: “And you shall destroy their name” — What does the verse teach? It has already said “you shall utterly destroy.” Rather, it comes to require that one give it a disparaging name. How so? If they called it Beit Galia (“house of revelation”), call it Beit Karya (“house of digging/lowliness”); Ein Kol (“spring of all”) — call it Ein Kotz (“spring of thorn”).
On the daf / in context: Beyond physical destruction, one must replace any positive or neutral name of an idolatrous site with a pejorative designation.
Type of Learning
Derash on the verse (Sifrei / Bavli) — the obligation to rename idolatrous sites pejoratively.
What Is Learned
One must replace the name of an idolatrous place with a degrading name.