pretense
/ˈprē-ˌten(t)s/
noun
a claim made or implied; especially : one not supported by fact
mere ostentation : pretentiousness
a pretentious act or assertion
idiom
to stop acting or appearing in a way that looks real but is false : to stop pretending
He abandoned/dropped all pretense at politeness.
idiom
She couldn't even make a pretense of liking him.