Breakdown, Rupture
noun, verbal noun
The decision is split, causing a breakdown in all we've decided. A big ol' rupture.
けつれつ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
あの男は奴らの決裂を、牢屋の中で舌なめずりをしながら待っていたに違いない。
That guy must have eagerly waited out their breakdown from behind bars.