not yet having made a choice or commitment about something
From the prefix 'un-' (not) combined with 'decided,' which comes from Latin 'decidere' (to cut off/determine). The root 'cida' relates to cutting, implying a final choice.
In elections, 'undecided voters' are so powerful that campaigns spend millions trying to win them over because a small group of undecided people can change the entire outcome of an election!
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