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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
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Bend your knees when you pick up heavy objects.
We were up to our knees in mud.
She wore a black dress reaching to just above the knee.
Her knees buckled and she fell to the floor.
Shirley sat in the corner, hugging her knees.
a serious knee injury
He dropped to his knees and started praying.
This is the American English definition of knee. View British English definition of knee.