The quality or state of being authentic, genuine, or trustworthy.
From 'authentical' + '-ness' (suffix forming abstract nouns). This layered suffix construction (Latin root + '-al' + '-ness') creates a doubly-marked noun emphasizing the quality itself.
Adding '-ness' to '-ical' to get 'authenticalness' is like piling on synonyms—it emphasizes how much we value and think about genuineness, showing up in formal writing where precision matters.
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