a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away | a structure or object that impedes free movement |
a curved edge formed by two intersecting vaults | any condition that makes it difficult to make progress or to achieve an objective |
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 | anything serving to maintain separation by obstructing vision or access |