"Knie" is a German noun that is commonly used to refer to the human knee. It specifically denotes the joint that connects the upper and lower parts of the leg, primarily consisting of the femur, tibia, and patella. The knee is a crucial articulation enabling movement and weight-bearing activities, such as walking, running, or jumping. It plays a fundamental role in posture, locomotion, and stability of the lower limbs, functioning as a hinge joint that allows flexion and extension.

Apart from its anatomical significance, "knie" is also employed metaphorically to describe the act of bowing or kneeling in a reverential or submissive manner. Symbolizing humility and respect, it is a gesture often employed during religious ceremonies, formal greetings, or expressions of supplication. For instance, in various religious traditions, individuals may bend their knees and lower their heads as a sign of devotion or reverence towards a religious figure or deity. Similarly, courtly etiquette might involve a person kneeling before a monarch or noble as a display of homage or loyalty.

In conclusion, "knie" is a German term primarily used to describe the joint connecting the thigh and lower leg in the human anatomy. Additionally, it signifies the act of bowing or kneeling as a symbol of respect, humility, or devotion.