What am I?

Forward I am heavy, backwards I am not. What am I?

related riddles

I'm not a bird, but I can fly through the sky. I'm not a river, but I'm full of water. What am I?

When I’m first said, I’m quite mysterious, but when I’m explained, I’m nothing serious. What am I?

I wear a red robe, with staff in hand and a stone in my throat. What am I?