This is the 15315th most frequent German word.
unterschrieben
"Unterschrieben" means "signed."
Here, 'unterschrieben' is the past participle form of the verb 'unterschreiben', indicating a completed action in the present perfect tense.
Ich habe den Vertrag unterschrieben.
I have signed the contract.
In this sentence, 'unterschrieben' is used in the passive voice to indicate the action of signing performed by other individuals.
Der Vertrag wurde von allen Beteiligten unterschrieben.
The contract was signed by all parties involved.
Here, 'unterschrieben' is part of the passive construction in the infinitive form, showing an action that is still to be completed.