Answer:
What is the word that even in plain sight remains hidden?
I am a nut with a hole. What am I?
I am free the first time and the second time, but the third time is going to cost you money. What am I?
Use me if you really want to see inside someone
They took me from my mother's side where I was bravely bred and when to age I did become they did cut off my head. They gave to me some diet drink that often made me mad but it made peace between two kings and made two lovers glad.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?