From un- + promised. <span class="searchmatch">unpromised</span> (not comparable) Not promised. 1979, James L. Calderwood, Metadrama in Shakespeare's Henriad: Richard II to Henry V: But...
unpromises, present participle unpromising, simple past and past participle <span class="searchmatch">unpromised</span>) (transitive) To revoke or annul (something promised before). 1605, George...