In law, challenging the credibility of a witness In government, a trial of an official that may result in their removal Start with an abbreviation of your existence, followed by a fuzzy fruit. Finish with the last four letters of a sidewalk material.

I choose this to be my riddle But where do we choose that together?

I have a bed, but I never rest. I have a mouth, but I never speak. I can run for miles without any feet, Cold and clear, or shallow and weak. Change my meaning, and I'm a patient man, Who will tolerate what he must, as long as he can. I will not suffer an insult or a lie; I’m a tiny river under an open sky.

People have me over, But dogs have me under. Walls wear me, As do many vehicles.

All the money in the world can't buy me. Still, I am the most valuable gift to give.