
widersprechen
to contradict
To express a different opinion to a person and not agree with them. The verb is used with the dative.
Ich muss Ihnen da leider entschieden widersprechen.
I'm afraid I must strongly contradict you there.
to contradict
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to contradict
To express a different opinion to a person and not agree with them. The verb is used with the dative.
Ich muss Ihnen da leider entschieden widersprechen.
I'm afraid I must strongly contradict you there.

to contradict
To be in contradiction with a statement, a fact, or a logic; to be incompatible.
Seine Handlungen widersprechen seinen Worten völlig.
His actions completely contradict his words.

to go against
To violate or go against a principle, a feeling, or a rule.
Es widerspricht meiner Natur, untätig zuzusehen.
It goes against my nature to stand by and do nothing.

to appeal / object
In the legal sense, to file a formal objection against a decision or official notice.
Sie haben vier Wochen Zeit, dem Bußgeldbescheid zu widersprechen.
You have four weeks to appeal the fine notice.
The verb is made up of 'wider' (against) and 'sprechen' (to speak). Its literal meaning is therefore 'to speak against.' It is an inseparable verb; the prefix is never separated from the stem.
Er hat nie widersprochen, wenn seine Eltern etwas entschieden haben.
He never contradicted his parents when they made a decision.
A very important point: 'widersprechen' (to contradict) always requires the dative. Whether you contradict a person, a statement, or an official notice, the object is in the dative.
Die neuen Fakten widersprechen der alten Theorie.
The new facts contradict the old theory.
When contradicting a person, this is often intensified or softened with adverbs. Typical combinations are 'entschieden widersprechen' (to strongly contradict), 'vehement widersprechen' (to vehemently contradict), or 'freundlich widersprechen' (to politely contradict).
Ich muss Ihnen da ganz entschieden widersprechen.
I must strongly contradict you there.
In this meaning, the subject and the dative object are often impersonal. It is about a logical conflict between two things, e.g. between actions and words or between two statements.
Dieses Ergebnis widerspricht allen Erwartungen.
This result contradicts all expectations.
This meaning belongs to official and legal language. Here, you object to an official document, for example a 'Bescheid' (official notice), a 'Mahnbescheid' (payment order), or a 'Rechnung' (invoice).
Wenn Sie der Rechnung widersprechen wollen, müssen Sie das schriftlich tun.
If you want to object to the invoice, you have to do it in writing.
to deny / cover / contest
Widersprechen means not agreeing with a person or their opinion. Bestreiten is more specifically directed at the truth of a statement. If you hold a different view, you widersprechen; if you state that a claim is untrue, you bestreiten it.

Ich widerspreche Lea, denn ihrer Einschätzung des Plans stimme ich nicht zu.
I disagree with Lea because I do not agree with her assessment of the plan.
Ich bestreite Leas Behauptung, dass der Plan zehn Millionen Euro kostet.
I deny Lea’s claim that the plan costs ten million euros.