mentir

/mɑ̃tiʁ/
1.
verbInf3rd

to tell a lie, to say something untrue (intentionally)

to be untrue or misleading (figurative use, e.g. 'the numbers lie')

Arrête de mentir, je sais que c'est toi qui as pris mon téléphone.

Stop lying — I know it was you who took my phone.

Synonyms:dire des mensonges, fabuler, raconter des salades, tromper
mentir - French Definition & Examples