How do you spell furdown?

"Furdoun" is not a standard English word. It's possible you meant one of the following:

* Fur down: This is a phrase that can refer to something being covered in fur, or to fur being removed from an animal.

* Furuncle: This is a medical term for a boil or abscess.

* Furlong: This is a unit of measurement equal to 1/8 of a mile.

If you can provide more context, I might be able to help you determine the correct spelling.