Where feet tread and dance, a sturdy stage, Holding the weight of all who engage. On me, worlds are built and dreams soar, Yet I'm just beneath your daily chore.

I can be kept, I can be broken, I am mightier than any sword, and yet, add one letter to me, and a sword is exactly what you’ll find. Now, then, what am I?

Treading ground. Spoken round. Chain bound. Coasting sound.

I have a spine, but no bones. I have a tail, but no body. I witness a thousand adventures, yet I never move an inch on my own. I’m the quiet sleeper between the pages, holding your place until the story resumes. What am I?

If you don't want uninvited guests moving in with their entire stock and barrel, you need me to keep them out.