noun, noun or participle which takes 'suru', intransitive verb
A decisive, often final parting from a person, group, or way of life. Carries a weightier, more deliberate tone than 別れ.
彼は過去の自分と決別する決心をした。
He made up his mind to break with his past self.
二人は静かに決別の握手を交わした。
The two quietly shook hands in farewell.