causeway (n.)

"road or path raised above the natural level of the ground," as a dry passage over wet places or along the top of an embankment, 1570s, from Middle English cauceweye "raised road" (mid-15c.). The first element is from Anglo-French cauce, Old North French cauciee (12c., Modern French chaussée), from Vulgar Latin *via calciata "paved way," from Latin calcis, genitive of calx (2) "limestone," or Late Latin calciare "to stamp with the heels, tread" (on notion of a road or mound across marshy ground made firm by treading down), from Latin calx (1) "heel." For second element, see way (n.).