This is the 13452nd most frequent German word.
beschrifteten
"Labeled" or "inscribed."
Here, 'beschrifteten' is used as an adjective (past participle) describing the noun 'Etiketten', meaning 'labeled' or 'with labels on them'.
Die beschrifteten Etiketten helfen, die Vorratsgläser zu organisieren.
The labeled stickers help organize the storage jars.
In this sentence, 'beschrifteten' functions as an adjective describing 'Kisten', indicating that the boxes were already written on or labeled.
Wir haben gestern alle beschrifteten Kisten ins Lager gebracht.
Yesterday we brought all the labeled boxes into the storage.
Here, 'beschrifteten' again acts as an adjective qualifying 'Tafeln', which means that the boards have writing on them denoting the lecture topics.