groyne/ɡɹɔɪn/EtymologyFrom Middle English groyn (“snout”), from Old French groign, from Late Latin grunium, grunia, from Latin grunnire (“grunt like a pig”).groyne means An often wooden structure that projects from a coastline to prevent erosion, longshore drift etc.; a breakwater. Lexicurio rates it Rare gem — a strength score of 77 out of 100.nounAn often wooden structure that projects from a coastline to prevent erosion, longshore drift etc.; a breakwater.“Old rail and timber groynes will be erected along the beach to trap shingle moved by coastwise drift, and to rebuild the protection to the toe of the embankment.”