unentschieden
tied / drawn
In a game, competition, or vote where no winner can be determined because both sides have the same number of points or votes.
Das Fußballspiel endete 2:2 unentschieden.
The soccer match ended in a 2–2 draw.

tied / undecided
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tied / drawn
In a game, competition, or vote where no winner can be determined because both sides have the same number of points or votes.
Das Fußballspiel endete 2:2 unentschieden.
The soccer match ended in a 2–2 draw.

The word is made up of the negation 'un-' and 'entschieden' (decided). 'Entschieden' is the past participle of 'entscheiden' (to decide). The literal meaning is therefore 'not decided'.
Die Wahl ist noch nicht entschieden, das Ergebnis ist knapp.
The election has not been decided yet; the result is close.
In sports contexts, 'unentschieden' (tied/drawn) is usually used as an adverb with verbs such as 'spielen' (to play), 'enden' (to end), or 'ausgehen' (to turn out/end). It then stands at the end of the sentence.
Die beiden Mannschaften spielten unentschieden.
The two teams played to a draw.
When a person is hesitating, 'unentschieden' (undecided) is combined with the verb 'sein' (to be). An 'ob' (whether) construction often follows to name the alternatives.
Sie ist noch unentschieden, ob sie nach Berlin oder Hamburg ziehen soll.
She is still undecided about whether she should move to Berlin or Hamburg.
open
'offen' and 'unentschieden' can both mean that something has not yet been settled. 'offen' is often used for questions, dates, plans, or results that still need to be clarified. 'unentschieden' can also fit a question or problem, but it is also very typical for a person who cannot decide yet. Learners can confuse the words because both have to do with a missing decision. As a simple guide: a matter can be 'offen' (open); a person is more likely to be 'unentschieden' (undecided).

Du bist noch unentschieden, ob du morgen mitkommen willst.
You are still undecided about whether you want to come along tomorrow.
Nach der Besprechung ist noch offen, wer das neue Projekt übernimmt.
After the meeting, it is still open who will take over the new project.