immersabilis
From LSJ
ὕπνος δεινὸν ἀνθρώποις κακόν → sleep is a terrible evil for humans (Menander, Sententiae monostichoi 1.523)
Latin > English (Lewis & Short)
immersābĭlis: (inm-), e, adj. inmerso,
I that cannot be sunk, i. e. unconquerable: (Ulixes) adversis rerum immersabilis undis, Hor. Ep. 1, 2, 22.
Latin > French (Gaffiot 2016)
immersābĭlis,¹⁶ e (in, merso), qui ne peut être submergé : Hor. Ep. 1, 2, 22.