Answer:
I am the only word that looks the same when spelled upside down.
Sometimes I annoy you, sometimes you can't live without me. But no matter how hard you try, you can't destroy me. What am I?
Weight in my belly trees on my back nails in my ribs feet I do lack.
I get wet when drying. I get dirty when wiping.
I am in truth a yellow fork from tables in the sky by inadvertent fingers dropped the awful cutlery. Of mansions never quite disclosed and never quite concealed the apparatus of the dark to ignorance revealed.
Give it food and it will live, give it water and it will die.