This is the 2882nd most frequent German word.
weggeworfen
"Thrown away."
The word 'weggeworfen' is the past participle of the verb 'wegwerfen,' which means 'to throw away.' It is used here to indicate a completed action of discarding the book.
Ich habe das alte Buch weggeworfen.
I threw away the old book.
The word 'weggeworfen' is used as an adjective here, derived from the past participle, describing the state of the paper as having been thrown away.
Das weggeworfene Papier liegt immer noch auf dem Boden.
The discarded paper is still lying on the floor.
In this sentence, 'weggeworfen' appears in combination with 'hast' to form the present perfect tense, denoting a completed action in the past relevant to the present discussion.