7 letters · 12 points in Scrabble
noun a transverse and totally enclosed drain under a road or railway
originOrigin obscure, with a number of possible etymologies suggested: * a dialectal word, * a word related to the name of the now-forgotten inventor, * a derivation from French couvert (“covered”), although couvert is not used in this sense and the French translation of culvert is ponceau or buse de drainage, * a derivation from an unrecorded Dutch word, possibly *coul-vaart, a combination of Dutch…
Etymology from Wiktionary, CC BY-SA 3.0