腋臭[wakiga] body odor (odour)
腋毛[wakige] underarm hair
腋窩[ekika] armpit
葉腋[youeki] leaf axil
腋窩腺[ekikasen] axillary gland

腋の下[wakinoshita] armpit
千金の裘は一狐の腋に非ず[senkinnokyuuhaikkonoekiniarazu] an expensive fur coat will not be made with a single fox alone
闕腋の袍[kettekinohou] robe worn by military officials with a round collar, unstitched open sides and no ran
闕腋[ketteki] unstitched, open side of some traditional Japanese clothing