The most terrible thing, though, was the fear that the wall could never be breached, that in his heart Alai was glad of the separation, and was ready to be Ender’s enemy.
As soon as he breached the seal of the mortar, water began to gush in through the crack, and Ender watched his death as his figure, now out of his control, struggled madly to stay alive, to keep from drowning.
It might be breached, that wall, sometime in the future, but for now the only real conversation between them was the roots that had already grown low and deep, under the wall, where they could not be broken.
There are no more uses of "breach" in the book.
Show samples from other sources
He was sued for breach of contract.
Once more unto the breach, dear friends, once more;