
die Authentizität
authenticity
The quality of being genuine, unaltered, and credible; genuineness.
Ein Experte bestätigte die Authentizität des Gemäldes.
An expert confirmed the authenticity of the painting.
authenticity
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authenticity
The quality of being genuine, unaltered, and credible; genuineness.
Ein Experte bestätigte die Authentizität des Gemäldes.
An expert confirmed the authenticity of the painting.

authenticity
A person's consistency with themselves, their values, and their nature, perceived as sincere and not affected.
Die Wähler schätzen an der Politikerin vor allem ihre Authentizität.
Voters appreciate the politician above all for her authenticity.
The noun 'Authentizität' (authenticity) is derived from the adjective 'authentisch' (authentic). The ending '-ität' is typical for abstract nouns that describe a quality and is often used with words of Latin origin.
Die Qualität dieses Produkts ist hoch, aber ich zweifle an seiner Authentizität.
The quality of this product is high, but I doubt its authenticity.
'Authentizität' (authenticity) is often combined with verbs that express checking or confirmation. Typical verbs are 'prüfen' (to check), 'bestätigen' (to confirm), 'anzweifeln' (to doubt), or 'infrage stellen' (to call into question).
Ein Historiker soll die Authentizität des alten Manuskripts prüfen.
A historian is supposed to check the authenticity of the old manuscript.
You can tell from the context whether the genuineness of an object or the sincerity of a person is meant. If it is about art, documents, or products, genuineness is meant. If people are talking about a person's character, it refers to their personal credibility.
Die Authentizität des Kunstwerks wurde von drei Experten bestätigt.
The authenticity of the artwork was confirmed by three experts.
credibility
The Glaubwürdigkeit of a report concerns whether its information is convincing and believable. Authentizität, by contrast, refers to its genuineness and unaltered presentation. An authentic report can seem credible, but genuineness and believability are not the same thing.

Die unveränderten Tagebuchzitate erhöhen die Authentizität des Berichts.
The unchanged diary quotations increase the report's authenticity.
Überprüfbare Details erhöhen die Glaubwürdigkeit des Berichts.
Verifiable details increase the report's credibility.