faux

/fo/
1. General
adjective

false

wrong

not true

inauthentic, not genuine

Ce que tu dis est faux : je n'ai jamais fait ça.

What you're saying is false; I never did that.

Synonyms:erroné, mensonger, factice, inauthentique
2. General
nounmasculine

a fake, forgery (object or document)

Ce tableau est un faux, il n'est pas de Monet.

That painting is a fake; it's not by Monet.

Synonyms:contrefaçon, imitation, falsification
faux - French Definition & Examples