Sentence:  His unsuccessful strivings to give up drink are represented as religious strivings ; he keeps a bottle in a wardrobe at home , and `` before this wardrobe Praisegod Piepsam had before now gone literally on his <WSD>knees</WSD> , and in his wrestlings had bitten his tongue - and still in the end capitulated '' . 
Meaning of the word marked with <WSD> tags:  hinge joint in the human leg connecting the tibia and fibula with the femur and protected in front by the patella