groins

'groins'

[groin.n.01] as in: 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

'groins'

[groin.n.02] as in: a curved edge formed by two intersecting vaults

'groins'

[breakwater.n.01] as in: a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away

'groins'

[groin.v.01] as in: build with groins

---

Examples:
The ceiling was groined