P / per-dĭŭturnus
adjective

per-dĭŭturnus

fem. per-dĭŭturna · neut. per-dĭŭturnum
that lasts a very long time; very lingering; protracted
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).