Reduplication & Pluralization

Sometimes in (some varieties of) Gilaki when you repeat an adjective, the singular noun becomes plural.

امی نال ٚ بۊن پیلا دار دره.

We have a big tree in our house (rough translation)

امی نال ٚ بۊن پیلا پیلا دار دره.

We have big trees in our house