Answer:
The more you take, the more you leave behind.
It cannot be seen, it weighs nothing, but when put into a barrel, it makes it lighter.
When set loose I fly away. Never so cursed as when I go astray.
A caribbean shape that makes ships disappear
I'm not really more than holes tied to more holes. I'm strong as good steel, though not as stiff as a pole.
What is so fragile that saying its name breaks it?