† impoˈtential,a.Obs.rare. [f. im-2 + potential.] Impotent. 1649G. Daniel Trinarch., Rich. II, lxxxv, It will adore An Onion..And tremble to its impotentiall Power.c1700Earl Oswald in Evans O.B. (1784) III. li. 303 Want, or secret dread, Or impotential age.