overfilledpast participle The word is a past-participle adjective derived from the verb “overfill”. Using the more specific label clarifies its grammatical status.
surchargéSe dit d’un contenant rempli au-delà de sa capacité normale. The overfilled suitcase was difficult to close, and she had to sit on it to zip it up.
La valise surchargée était difficile à fermer, et elle a dû s’asseoir dessus pour la fermer.