What is so fragile that saying its name breaks it?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

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

Can anyone tell me a word in the English dictionary which has a silent 'z'?

Which English verb becomes past tense just by rearranging the letters?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

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

It is always ahead of me yet I can never see it. What is it?

_ _ _ IE _ _
_ _ _ IE _
_ _ IE _ _
_ _ IE _
_ _ _ _ IE

Like you see, some letters have gone missing from these words that contain the IE pair at some or the other place. The letters that will be used to fill the blanks are given below. Use them and form meaningful words. Can you do that?

A, C, D, F, H, K, L, M, N, N, O, R, R, S, S, S, T, T, Y and Y.

What is always in front of you but can’t be seen?