Answer:
What is that you will break everytime you name it?
Used left or right, I get to travel over cobblestone or gravel. Used up, I vie for sweet success, used down, I cause men great duress.
An open ended barrel, it is shaped like a hive. It is filled with the flesh, and the flesh is alive!
Something wholly unreal, yet seems real to I. Think my friend, tell me where does it lie?
Walk on the living, they don't even mumble. Walk on the dead, they mutter and grumble.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?