Answer:
With head without hair. With mouth without tooth.
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
As a whole, I am both safe and secure. Behead me, I become a place of meeting. Behead me again, I am the partner of ready. Restore me, I become the domain of beasts.
You can spin, wheel and twist, but this thing can turn without moving. What is it?
You get many of me, but never enough. After the last one, your life soon will snuff. You may have one of me but one day a year, When the last one is gone, your life disappears.
What is so fragile that saying its name breaks it?