undetermine

Etymology

un- + determine

verb

1. (transitive) To undo the determining of; to make uncertain.
   The antithetical features of atomist doctrine are no longer seen as undetermining the principle of the atom, or negating sensuous appearance, but rather as intrinsic to both. Nature is full of contradictions […] 2000, Daniel Tiffany, Toy Medium: Materialism and Modern Lyric, page 173
   In such cases, even the licence conferred by strict speaking is powerless to 'undetermine' the statement—to make any and every context seem admissible. 2014, Rupert Crawshay-Williams, Methods and Criteria of Reasoning, page 148