unprobable

English

Etymology

From un- +‎ probable.

Adjective

unprobable (comparative more unprobable, superlative most unprobable)

1. (archaic) Improbable; unlikely.
   • 1859, Isaac Barrow, Alexander Napier, The Theological Works of Isaac Barrow, D.D., volume 5, page 225:

     It is not unprobable, that our Lord gave an express command, that Peter should so fix his See at Rome, that the Bishop of Rome should absolutely succeed him.