authenticity

authentic +‎ -ity

• (US, cot–caught merger) IPA^(key): /ɑθɛnˈtɪsɪti/, /ɑθənˈtɪsɪti/, [ɑθɛnˈtɪsɪɾi], [ɑθənˈtɪsɪɾi]

• Audio (US)

  (file)

authenticity (usually uncountable, plural authenticities)

1. The quality of being genuine or not corrupted from the original, of having the same origin (or attribution, commitment, intention, etc.) as claimed.

   I hereby certify the authenticity of this copy.

   The authenticity of this painting is questionable.

   • 2018, James Lambert, “A multitude of ‘lishes’: The nomenclature of hybridity”, in English World-Wide‎, page 2:

     Urban Dictionary records at least 66 of the terms found by the present research, but as this dictionary liberally accepts words, definitions, and sample sentences based solely on the say-so of contributors, in the absence of corroboration from other sources the authenticity of some entries must remain dubious.

2. (obsolete) The quality of being authentic (of established authority).

• (quality of being genuine): genuineness

• (antonym(s) of “quality of not being genuine”): phoniness; forgery; fakeness; bogosity

• authentically
• authentication
• authenticism
• authenticness (archaic)
• authentification

• authenticity on Wikipedia.Wikipedia