I.that lasts a very long time, very lingering or protracted (rare but class.), Cic. N. D. 2, 33, 85 (but Cic. Sest. 27, 58 Halm and B. and K. read diuturnum).
Quick answers
What does per-dĭŭturnus mean in Latin?
per-dĭŭturnus, a adjective, means “that lasts a very long time”.
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