Third-person singular simple present indicative form of knee.(verb)
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Use "knees" in a sentence
"Across his knees is a thick club, and behind him crouches a woman."
"That's me standing; the man kneeling in humble worship and respectful silence on his knees is my good friend Dr. Anthony "Tony" Clark, looking surprisingly spry and alert for someone who has just flown in from China and was suffering severe jet lag when the picture was taken."
"Flat on your back with your head between your knees is an awkward throwing position."