importuosus
From LSJ
Latin > English (Lewis & Short)
importŭōsus: (inp-), a, um, adj. 2. in-portuosus,
I without a harbor: mare, Sall. J. 17, 5: laeva inportuosa Italiae litora, Liv. 10, 2, 4; Tac. A. 4, 67: litus, Plin. Ep. 6, 31, 17: insula importuosissima omnium, Plin. 4, 12, 23, § 73.
Latin > French (Gaffiot 2016)
importŭōsus,¹³ a, um (in, portuosus), qui manque de port [en parl. d’une mer] : Sall. J. 17, 5 ; Tac. Ann. 4, 67 || inabordable [côte] : Plin. Min. Ep. 6, 31, 17 || -sissimus Plin. 4, 73.