An elevated and somewhat old-fashioned way to express 'keineswegs' (by no means) or 'ganz und gar nicht' (not at all); a strong negation.
example
Die Behauptung, er habe davon gewusst, ist mitnichten wahr.
The claim that he knew about it is by no means true.
Usage tips
Word order
'Mitnichten' (by no means) often appears at the beginning of a sentence in position 1. In this case, the verb follows directly after it in position 2, and the subject is in third position.
EXAMPLE
Mitnichten war er mit diesem Vorschlag einverstanden.
By no means did he agree with this proposal.
Register and style
This word belongs to elevated written language and often sounds formal or literary. It is used only very rarely in everyday spoken language.
EXAMPLE
Die Lage hat sich mitnichten verbessert, sondern verschlechtert.
The situation has by no means improved, but rather worsened.
Strong negation
'Mitnichten' (by no means) is a very strong and definitive form of negation. It is used to firmly reject a statement or claim.
EXAMPLE
Die Gerüchte sind mitnichten wahr.
The rumors are by no means true.
Compare with
near_synonym
mitnichten vs keineswegs
by no means
'keineswegs' and 'mitnichten' both mean 'not at all' and strongly negate a statement. The difference is mainly in style. 'keineswegs' is clear, but still relatively normal in formal or factual sentences. 'mitnichten' sounds elevated, old-fashioned, or sometimes even slightly humorous. In everyday language, 'keineswegs' is usually more natural; 'mitnichten' is more suited to special, emphatic, or written language.
mitnichten
Das Ergebnis war mitnichten ein Zufall, sondern harte Arbeit.
The result was by no means a coincidence, but the product of hard work.
keineswegs
Die Reise war keineswegs langweilig, obwohl es viel geregnet hat.
The trip was by no means boring, even though it rained a lot.