dens

Latin dens (genitive dentis) meant tooth. It came from Proto-Indo-European *h₁dent-, a root so stable that its descendants are recognizable across dozens of languages separated by millennia. Sanskrit had danta. Greek had odous (genitive odontos). Gothic had tunthus. English has tooth. All trace back to the same prehistoric syllable, spoken long before writing existed.

Roman dentistry was more advanced than its reputation suggests. The Etruscans, before Rome rose, made gold bridgework as early as 700 BCE. Aulus Cornelius Celsus, writing around 30 CE in his encyclopedia De Medicina, described extraction techniques, remedies for toothache, and methods for wiring loose teeth. The elder Pliny recommended toothpaste made from ground bones and oyster shells.

The adjective dentalis appeared in medieval Latin medical texts and entered French as dental by the 1500s. English borrowed it in the 1590s. Pierre Fauchard, a French surgeon, published Le Chirurgien Dentiste in 1728 -- the first comprehensive textbook on dentistry. He is called the father of modern dentistry, and his title enshrined the Latin root in the profession's name permanently.

English stacked the Latin root with abandon. Dentist, denture, dentures, indent, trident -- all from dens. The Germanic cousin tooth runs in parallel, so English has both dental hygienist and toothbrush, both denture and teething, Latin formality and Anglo-Saxon plainness naming the same thirty-two bones in your jaw.