ˈbɹeɪkˌwɔːtə ˈbʊl.wək ˈbʊl.wɝk ɡɹɔɪn məʊl build with groins The ceiling was groined a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away a curved edge formed by two intersecting vaults the crease at the junction of the inner part of the thigh with the trunk together with the adjacent region and often including the external genitals