This is the 667th most frequent German word.
vollständig
Complete; entire; full.
In this sentence, 'vollständig' means 'completely', emphasizing total completion.
Das Projekt ist jetzt vollständig abgeschlossen.
The project is now completely finished.
Here, 'vollständig' describes the state of the list as not being whole or complete.
Die Liste war nicht vollständig, weshalb wir sie ergänzen mussten.
The list was not complete, so we had to add to it.
In this case, 'vollständig' signifies that the painting has been restored to its original, entire state.