What is so fragile that saying its name breaks it?

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

A bus driver was heading down a street in Mexico. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

What two things can you never eat for breakfast?

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?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

The more it dries, the wetter it becomes. Can you tell what it is?

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