: not having made a decision. : not having an answer or result : not yet settled or resolved. See the full definition for undecided in the English Language Learners Dictionary.

What type of word is undecided?

Open and not yet settled or determined. "The question of man's destiny is still undecided." Uncommitted, not having reached a decision.

What is the root word for undecided?

undecided (adj.)

1530s, "not decided, unsettled," from un- (1) "not" + past participle of decide (v.).