The Collaborative International Dictionary
Inopinable
Inopinable \In`o*pin"a*ble\, a. [L. inopinabilis. See
Inopinate.]
Not to be expected; inconceivable. [Obs.] ``Inopinable,
incredible . . . sayings.''
--Latimer.
Wiktionary
inopinable
a. (context obsolete English) Not to be expected; inconceivable.