the part of the body where the legs join the main part of the body, including the area around the genitals (= sex organs) 腹股沟；大腿根儿 
She kicked her attacker in the groin. 她朝袭击者的下身踢了一脚。 He's been off all season with a groin injury. 他因腹股沟伤痛休息了整个赛季。 to suffer a groin strain 腹股沟拉伤
- (US English) (British English groyne)
a low wall built out into the sea to prevent it from washing away sand and stones from the beach 丁坝（防止海浪侵蚀海滩砂石的矮墙）
Word Originsense 1 late Middle English grynde, perhaps from Old English grynde ‘depression, abyss’.