burn down
US /bɜːrn daʊn/
UK /bɜːrn daʊn/

1.
incendiar, quemarse por completo
to destroy something with fire, or to be destroyed by fire
:
•
The old factory burned down last night.
La antigua fábrica se incendió por completo anoche.
•
They threatened to burn down the entire building.
Amenazaron con incendiar todo el edificio.