WordmysteriösMeaningmysteriousPart of speechadjPronunciationCourseGermanLessonReported speech of 'to be' (sei, seien)Usages of mysteriösMan sagt, der Campus sei sehr mysteriös.People say the campus is very mysterious.Die Kommilitonen flüstern, der Geheimbund sei mysteriös.The fellow students whisper the secret society is mysterious.