Sentence:  Would he have to clean up after her every day , clean the kitchen , the bathroom , and get down on his <WSD>knees</WSD> and scrub the kitchen floor , then hang up her dresses , pick up her stockings , make the bed while she lay around ? 
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