undecided

From Middle English undecided, equivalent to un- +‎ decided.

undecided (comparative more undecided, superlative most undecided)

1. Open and not yet settled or determined.

   The question of man's destiny is still undecided.

2. Uncommitted, not having reached a decision.

   The result of the election is in doubt because of a large number of undecided voters.

• (open and not yet settled): indeterminate, unsettled, indecisive
• (uncommitted; not having reached a decision): ambivalent, irresolute, of two minds, indecisive

undecided (plural undecideds)

1. A voter etc. who has not yet come to a decision.
   • 2008 February 17, Jennifer Finney Boylan, “At the Maine Caucuses, a Tough Nut to Crack”, in New York Times‎:

     The real drama came as these two camps fought for undecideds, who literally found themselves in the middle.

undecided

1. simple past tense and past participle of undecide

• deinduced