Answer:
Turns us on our backs, and open up our stomachs. You will be the wisest of men though at start a lummox.
I know a word of letters three. Add two, and fewer there will be!
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
Thousands lay up gold within this house, But no man made it. Spears past counting guard this house, But no man wards it.
The sharp slim blade, that cuts the wind.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?