ph.

1. 焚毁；（使）烧成平地
If a building burns down or if someone burns it down, it is completely destroyed by fire.

1. burn completely
be consumed or destroyed by fire

e.g. The hut burned down
The mountain of paper went up in flames

Synonym: burn upgo up

2. destroy by fire

e.g. They burned the house and his diaries

Synonym: burnfire