ĭn-exsŭpĕrābĭlis

e, adj.
I. that cannot be crossed or passed over, insurmountable (a favorite word with Livy).
I. Lit.: Alpes, Liv. 5, 34, 6: ripa, id. 44, 35, 8: serrae, id. 21, 30, 7: manu, Vell. 2, 32, 4; cf. id. 2, 120, 2.—Comp.: inexsuperabilior saltus fuit, Liv. 36, 17, 3.—
II. Trop.: vis fati, Liv. 8, 7, 8: bonum, Sen. Ep. 85.—Plur. as subst.: inexsuperabilibus vim afferre, Liv. 38, 20, 8.
Lewis & Short
A Latin Dictionary, 1879
An open-access project