Break Riddles

I live in my little house all alone...
Riddle:
I live in my little house all alone. There are no windows or doors, and if I want to go out I have to break through the wall. What am I?
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What Has to Be Broken...
Riddle:
What must you break before you can use it?
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So Fragile
Riddle:
What is so fragile that saying its name breaks it?
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Break Without Touching
Riddle:
What can you break without ever touching it?
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Break Before Use
Riddle:
What do you break before you use it?
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