burn (something) down
phrasal verb with burn verb uk/bɜːn/ us/bɝːn/ burnt or burned | burnt or burned
B2 烧毁，焚毁（尤指建筑物）
to destroy something, especially a building, by fire, or to be destroyed by fire
He tried to burn down the school by setting fire to a pile of papers. 他放火点燃了一堆报纸，妄图烧毁学校。