perdiuturnus
From LSJ
λέγεται δὲ καὶ κλῶνας αὐτῆς θύραις ἢ θυρίσι προστεθέντας ἀποκρούειν τὰς τῶν φαρμάκων κακουργίας → its branches attached to doors or windows are said to repel the evil of spells
Latin > English (Lewis & Short)
per-dĭŭturnus: a, um, adj.,
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).
Latin > French (Gaffiot 2016)
perdĭŭturnus, a, um, qui dure très longtemps : Cic. Nat. 2, 85.