Past-participle adjective derived from the verb “amass”; used attributively and predicatively.
She donated a portion of her amassed fortune to charity.
Elle a donné une partie de sa fortune amassée à des œuvres caritatives.
Used attributively to describe something that has been gathered or accumulated.
The amassed evidence left little doubt about his guilt.
Les preuves amassées ne laissaient guère de doute sur sa culpabilité.