What is the French word to use for closing a letter?

The most common and versatile French closing for letters is "Cordialement". It translates to "Sincerely" in English and is appropriate for most formal and informal letters.

Here are some other options depending on the context:

Formal:

* "Sincères salutations" - "Sincerely yours"

* "Avec mes salutations distinguées" - "With my distinguished greetings"

* "Bien cordialement" - "Very sincerely"

* "Meilleures salutations" - "Best regards"

Informal:

* "Amitiés" - "Best wishes"

* "Affectueusement" - "Warmly" (close friends and family)

* "Bien à toi" - "Best to you" (very informal)

Professional:

* "Dans l'attente de votre réponse" - "Awaiting your response" (after a request)

* "Je vous remercie de votre attention" - "Thank you for your attention" (after a request)

The best closing will depend on the recipient and the tone of the letter.