Through the years ahead, I shall rebuild the achievements of the past, and open the way to carry them further, the achievements which are open to me, but closed forever to my brothers, for their minds are shackled to the weakest and dullest ones among them.
There are no more uses of "shackle" in the book.
Show samples from other sources
Half-naked, bruised, and shackled to the wall.
Suzanne Collins -- Mockingjay
He holds up some sort of metal headgear that I instantly name the head shackle.