Nouveau is the French word for new, borrowed into English primarily as part of French phrases — nouveau riche (newly rich), Art Nouveau (new art), Beaujolais nouveau (new Beaujolais wine), and nouveau cuisine (new cooking). It traces through Old French novel/noveau to Latin novellus (new, young), a diminutive of novus (new), from Proto-Indo-European *néwos (new).
The PIE root *néwos is one of the most stable and widely preserved words in the entire Indo-European family. Its descendants are recognizable across every major branch: English new, German neu, Latin novus, Greek neos, Sanskrit navas, Russian novyj, Lithuanian naũjas, Irish nua, Welsh newydd. The consistency is remarkable — after roughly six thousand years of linguistic change, the word for new is still transparently similar across languages from Ireland to India.
In English, the *néwos root produced two streams of vocabulary. The native Germanic stream gave new itself, along with news and renew. The Latin stream, entering through French and scholarly borrowing, gave novel (new, and a new literary form), novice (one new to something), nova (a new star), innovate (to make new), renovate (to make new again), and nouveau.
The phrase nouveau riche, meaning newly wealthy (especially with the implication of lacking the refinement of old money), entered English in the 1810s. It carries a distinctly snobbish connotation — the established aristocracy's disdain for those who have acquired wealth without the cultural education that supposedly accompanies inherited fortune. The phrase reveals the paradox of European class systems: wealth alone was insufficient for social acceptance; it required the patina of time.
Art Nouveau, the decorative art movement that flourished from approximately 1890 to 1910, took its name from a Parisian gallery, La Maison de l'Art Nouveau. The movement's sinuous, organic, nature-inspired designs were deliberately new — a rejection of the historicism that dominated 19th-century design in favor of something genuinely modern.
The persistent borrowing of nouveau into English phrases reveals something about the cultural dynamics of the two languages. English tends to use French for concepts related to sophistication, culture, cuisine, and social distinction — areas where French cultural authority has historically been acknowledged. The word new can describe anything; nouveau describes the specifically cultural act of being new.