groin
build with groins
The ceiling was groined
breakwater
groyne
mole
bulwark
seawall
jetty
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
inguen
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