wiederholten

In a sentence

• Die Lehrer wiederholten die wichtigsten Punkte vor der Prüfung.

  The teachers repeated the key points before the exam.

  In this sentence, 'wiederholten' is the past tense plural form of the verb 'wiederholen', which means 'to repeat'. It reflects an action performed by multiple subjects (teachers) in the past.

• In den wiederholten Versuchen gelang es ihnen endlich, das Problem zu lösen.

  In the repeated attempts, they finally succeeded in solving the problem.

  Here, 'wiederholten' is used as an attributive adjective in the dative plural form to describe the noun 'Versuchen' (attempts), indicating these attempts were done repeatedly.

• Er war frustriert aufgrund der wiederholten Fehler.

  He was frustrated due to the repeated mistakes.

  In this example, 'wiederholten' again functions as an adjective, describing 'Fehler' (mistakes) as occurring repeatedly.