noun, noun which may take the genitive case particle 'no'
finished with; no longer needed; having served its purpose
Describes a person, object, or matter that is no longer required or whose business is concluded. Often used in contexts where something or someone is dismissed or discarded after use.
Those documents are no longer needed, so you can throw them away.
He was fired as soon as he was no longer useful.
Compound of 用 (yō, 'business, use') and 済み (zumi, 'finished, completed').