This is the 636th most frequent Thai word.
เผ
"เผ" means "to roast" or "to burn" in English.
In this sentence, 'เผา' means 'burn' and is used as an action of burning something physically.
เขาเผากระดาษเพื่อทำความสะอาด.
He burned paper to clean up.
Here, 'เผา' is used to describe an act that resulted in the house being burned.
เผาบ้านเสียแล้ว!
The house is burnt down!
In this context, 'เผา' signifies the agricultural method of burning fields for preparation and regrowth.