Source: p 143, A Concise Introduction to Logic (12 Ed, 2014) by Patrick J. Hurley
We saw in Chapter 1 that an argument from authority is an inductive argument in which an arguer cites the authority or testimony of another person in support of some conclusion.
The appeal to unqualified authority fallacy is a variety of the argument from authority and occurs when the cited authority or witness lacks credibility.
I already understand, and so ask not about, the definition of Appeal to Unqualified Authority. Instead I ask about the history or etymology behind this term, a question of the history of philosophy, and not of linguistics because:
I suspect a semantic change particular to philosophy such as that behind ignoratio elenchi (The translation in English of the Latin expression has varied somewhat)
the Latin singular accusative 'verēcundiam' did not mean 'authority':
verēcundia f (genitive verēcundiae); first declension
1.knowing one's place, regarded as a virtue; coyness, modesty
2. shame, awe