First is passed from a good meal, or bad, but hopefully it passes in peace, without a smell. Second is a place for turning, sometimes for grinding, often for more. Put together, I am a foe to an imaginative knight, whose dreams led to battles falsely fought.

You probably have twenty but a hardware store has many more.

Emergency room. Difficult extraction. Any bright ideas on getting this out?

I hold what you wear when it’s no longer clean, or slow your progress without being seen.

I am fast and slow. People know when I pass, but do not see me. You may hear me, by the noise of a tick tick tick. What am I?