How to Say “Compulsive Liar” in French

menteur compulsif
The English phrase "compulsive liar" is menteur compulsif in French.
This phrase describes a person who lies habitually and uncontrollably, often without a clear motive.

Which one should you use?

You may also use mythomane to refer to a mythomaniac or someone with a pathological tendency to lie. The term Mytho is a shortened version of mythomane used to refer to someone who constantly tells lies. For a more formal context, you can use Menteur pathologique to mean "pathological liar".

How does it change in a sentence?

The feminine form is menteuse compulsive. To form the masculine plural, both the noun and the adjective take an 's', resulting in menteurs compulsifs.

Did you know?

  • The word menteur is derived from the Latin mentior, but it shares a distant linguistic root with the English word 'mind', as both relate to the mental faculty.
  • In French, a mythomane is specifically viewed as someone who believes their own fabrications, whereas a menteur is conscious of the deception.
  • While English uses 'cheat' for both lying and breaking game rules, French strictly separates a menteur from a tricheur, who only cheats at games or tests.

Examples in context

  • Il est connu pour être un menteur pathologique.
    He is known to be a compulsive liar.
  • Tu le connais, c'est un mytho depuis toujours !
    You know him, he's been a mytho forever!
  • Elle présente souvent des signes de mensonge compulsif.
    She often exhibits signs of compulsive lying.
  • Elle est vraiment une mythomane !
    She's really a compulsive liar!
  • Je ne peux pas sortir avec un menteur compulsif.
    I cannot date a compulsive liar.
  • Il agit comme un menteur compulsif depuis son enfance.
    He has acted like a compulsive liar since his childhood.

Example conversation

Léa and Hugo are discussing a mutual acquaintance at a cafe.

  1. Léa

    Tu crois encore à ses histoires ?
    Do you still believe his stories?
  2. Hugo

    Non, c'est un menteur compulsif.
    No, he is a compulsive liar.
  3. Léa

    C'est triste pour lui.
    That is sad for him.
  4. Hugo

    Oui, il a un vrai problème.
    Yes, he has a real problem.

Sources

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Julie Sadie
Julie SadieHelp make this guide better. Spot a mistake, know another way to say it, or have an example from real life? Share it below.
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