inauthentic
Concise Oxford English Dictionary © 2008 Oxford University Press:
inauthentic/ɪnɔːˈθentɪk/
▶adjective not authentic, genuine, or sincere.
– derivatives
inauthentically adverb,
inauthenticity noun.
inauthentically adverb,
inauthenticity noun.
'inauthentic' also found in these Oxford entries:

