groin

n. area where the thigh joins the abdomen (Anatomy); area where two vaults intersect (Architecture)

The groin is the at the junction of the torso with the legs and the adjacent region that includes the external genitals. The term may be used as a euphemism for genitals, since the names of the latter are taboo words in some cultures. When someone has "pulled his/her groin muscles", usually, this person has pulled a muscle in the inner thigh.
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Groin inguen. groin n. The crease or hollow at the junction of the inner part of each thigh with the trunk, together with the adjacent region and [more]Groin - Community and Resources

Noun
1. 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
(synonym) inguen
(hypernym) area, region
(part-holonym) loins
2. a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
(synonym) breakwater, groyne, mole, bulwark, seawall, jetty
(hypernym) barrier
Verb
1. build with groins; "The ceiling was groined"
(hypernym) construct, build, make
(classification) construction, building

n. snout, part of an animals head which projects forward and contains the nose and jaws