By Mary Morel
Inauthentic and unauthentic both mean the same thing: ‘not authentic’, i.e. not genuine or real.
Her apology was inauthentic.
Her apology was unauthentic.
A lot of the news on Facebook is inauthentic.
A lot of the news on Facebook is unauthentic.
Other in- and un- negatives also mean the same thing: