
zweifelsohne
undoubtedly
Expresses that something is certain and indisputable; without any doubt.
Sie ist zweifelsohne die beste Kandidatin für diesen Job.
She is undoubtedly the best candidate for this job.
undoubtedly
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undoubtedly
Expresses that something is certain and indisputable; without any doubt.
Sie ist zweifelsohne die beste Kandidatin für diesen Job.
She is undoubtedly the best candidate for this job.
The word is made up of 'Zweifel' (doubt) and 'ohne' (without). So it literally means 'ohne Zweifel' (without a doubt), which makes it easy to understand and remember.
Das ist zweifelsohne die richtige Entscheidung.
That is undoubtedly the right decision.
As an adverb, 'zweifelsohne' (undoubtedly) can stand in different positions in the sentence. If it is in position 1, the conjugated verb follows immediately. But it can also stand after the verb and the subject.
Zweifelsohne hat er sein Bestes gegeben.
Undoubtedly, he gave it his best.
'Zweifelsohne' (undoubtedly) belongs more to written language or to a formal, elevated style. It is used less often in everyday colloquial speech.
Die Ergebnisse der Studie sind zweifelsohne von großer Bedeutung.
The results of the study are undoubtedly of great importance.
undoubtedly
Both words express that something is certain and indisputable, and they are often interchangeable. Zweifellos usually sounds more neutral in standard German, whereas zweifelsohne sounds distinctly more elevated and less common. In an everyday sentence, zweifellos is therefore usually more suitable; zweifelsohne is possible in an especially formal style.

Diese Entscheidung ist zweifelsohne richtig.
This decision is undoubtedly correct.
Diese Entscheidung ist zweifellos richtig.
This decision is undoubtedly correct.