Englishfor English speakers
groin
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noun
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
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noun
a curved edge formed by two intersecting vaults
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verb
build with groins
The ceiling was groined
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noun
(= breakwater)
a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away