What is so fragile that saying its name breaks it?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What will you call your mother's brother's brother-in-law?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

Which five letter word can be added at the end of below word to form a
valid word?

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Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?