
wider
against
Expresses that something is directed against a person, thing, rule, or principle; it means “against” or “contrary to” and takes the accusative.
Sein Verhalten war wider das Gesetz.
His behavior was against the law.
against
wider + accusative
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against
Expresses that something is directed against a person, thing, rule, or principle; it means “against” or “contrary to” and takes the accusative.
Sein Verhalten war wider das Gesetz.
His behavior was against the law.

against one's will
Against one's own will or without one's consent.
Sie musste wider Willen an der Diskussion teilnehmen.
She had to take part in the discussion against her will.

contrary to expectations
Contrary to what one expected.
Wider Erwarten bestand er die schwierige Prüfung.
Contrary to expectations, he passed the difficult exam.

despite knowing better
Although one knows or understands something to be right, one acts or claims otherwise.
Er bestritt wider besseres Wissen seine Verantwortung.
Despite knowing better, he denied responsibility.
The preposition “wider” takes the accusative. This is especially clear with masculine nouns and possessive pronouns.
Er handelte wider den ausdrücklichen Wunsch seiner Eltern.
He acted against his parents' explicit wishes.
“Wider” as an independent preposition belongs more to elevated, written, or legal language. In fixed expressions, the word is also common in general texts.
Die Entscheidung wurde wider geltendes Recht getroffen.
The decision was made contrary to applicable law.
“Wider Willen” (against one's will) is usually used as an adverbial complement and describes the circumstances under which someone does or experiences something. The expression is also often used with a possessive pronoun: “wider seinen Willen” (against his will) or “wider ihren Willen” (against her will).
Wider ihren Willen musste sie die Verantwortung übernehmen.
Against her will, she had to take on the responsibility.
“Wider Erwarten” (contrary to expectations) can appear at the beginning of a sentence and then refers to the entire statement that follows. After this position, the finite verb comes directly in second position.
Wider Erwarten gewann unser kleines Team das Finale.
Contrary to expectations, our small team won the final.
“Wider besseres Wissen” (despite knowing better) is often used with verbs of asserting, denying, or acting. The expression makes it clear that someone disregards their own better knowledge.
Sie behauptete wider besseres Wissen, von dem Fehler nichts gewusst zu haben.
Despite knowing better, she claimed that she had known nothing about the mistake.