kuà
crotch
groin; hip
胯下之辱
kuà xià zhī rǔ
lit. the humiliation of having to crawl between the legs of one's adversary (as Han Xin 韓信|韩信[Han2 Xin4] supposedly did rather than engage in a sword fight) (idiom)
胯下物
kuà xià wù
(slang) male member
胯间
kuà jiān
crotch; groin
胯骨
kuà gǔ
hip bone
腰胯
yāo kuà
hips