Something about which there is no dispute or doubt and which is recognized by everyone. It is a clear and accepted fact.
example
Es ist unumstritten, dass sie die beste Spielerin im Team ist.
It is undisputed that she is the best player on the team.
Usage tips
Word structure
The word is made up of the prefix 'un-' and the adjective 'umstritten' (disputed/controversial). 'Umstritten' means that there is disagreement about something. 'Unumstritten' (undisputed) therefore means the opposite: there is no dispute or doubt.
EXAMPLE
Der Sieg der Mannschaft war nach dem klaren Ergebnis unumstritten.
After the clear result, the team's victory was undisputed.
Sentence structure with 'dass'
A very common construction is 'es ist unumstritten, dass ...' (it is undisputed that ...). This is followed by a subordinate clause that describes the indisputable fact.
EXAMPLE
Es ist unumstritten, dass der Klimawandel eine große Herausforderung darstellt.
It is undisputed that climate change represents a major challenge.
Typical collocations
'Unumstritten' (undisputed) often describes facts, results, or a person's status. Typical combinations are 'eine unumstrittene Tatsache' (an undisputed fact), 'ein unumstrittener Sieg' (an undisputed victory), or 'der unumstrittene Experte' (the undisputed expert).
EXAMPLE
Seine Kompetenz auf diesem Gebiet ist unumstritten.
His competence in this field is undisputed.
Formal style
This word belongs more to written language and formal usage. You often find it in news reports, reports, or academic discussions.
EXAMPLE
Die Ergebnisse der Studie sind wissenschaftlich unumstritten.
The results of the study are scientifically undisputed.
Compare with
antonym
unumstritten vs fraglich
questionable / in question
'fraglich' and 'unumstritten' express opposites. 'fraglich' fits when something is uncertain or when doubts still exist. 'unumstritten' fits when there is no serious disagreement or doubt and something is generally recognized. You can say: if something is 'fraglich', it is still open. If something is 'unumstritten', it is considered clear.
unumstritten
Dass Bewegung gut für die Gesundheit ist, gilt als unumstritten.
That exercise is good for your health is considered undisputed.
fraglich
Vor dem Termin ist noch fraglich, ob alle Unterlagen vollständig sind.
Before the appointment, it is still unclear whether all the documents are complete.