knee
The Italian word for knee is 'ginocchio'. It is a noun and is used to refer to the joint in the human body that connects the thigh with the lower leg. It is used in the same way as the English word 'knee' and can be used in sentences such as 'I hurt my knee' (Ho ferito il mio ginocchio) or 'I knelt down on my knee' (Mi sono inginocchiato sul mio ginocchio).
I have a pain in my knee.
This sentence is used to express when somebody is feeling a physical discomfort or pain in their knee.
My knee is swollen.
This sentence is used when someone's knee has become larger than its normal size, usually as a result of injury or illness.
I fell on my knee.
This sentence is used when someone has fallen and landed on their knee, usually implying a degree of pain or injury.