"Keen" and "knee" are two words that sound similar but have different meanings.
"Keen" is an adjective that means having a strong interest or enthusiasm for something. For example, you might say "He is very keen on playing football" to describe someone who is passionate about playing football.
"Knee" is a noun that refers to the joint between the thigh and the lower leg. For example, you might say "I hurt my knee when I fell down" to describe an injury to the joint.
In summary, "keen" is an adjective that means having a strong interest or enthusiasm for something, while "knee" is a noun that refers to the joint between the thigh and the lower leg.
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