Why “tutoyer” is a great word
To address someone in French using the familiar second-person singular pronoun *tu* rather than the formal *vous*. Borrowed from French *tutoyer*, literally 'to address with the pronoun *tu*', from *tu* (the familiar 'you') + the suffix *-oyer* (forming verbs), first attested in English in the late 17th century. Unlike *vouvoyer*, which enforces a strict protocol of distance, or the archaic English 'to thou', which conjures a specific historical intimacy now lost, *tutoyer* is a deliberate social contract, a linguistic handshake that dissolves distance. It is the professor inviting a student to drop the honorific, the stranger at a Parisian bar deciding you are no longer *vous*, or the moment a shared secret melts a professional demeanor into a conspiratorial smile—the small revolution of two people agreeing to be smaller together.
Definitions & examples from Wiktionary (CC BY-SA 3.0).