膝 - knee, lap

knee

direct negotiations; pressing a demand with a face-to-face talk

laying one's head in someone's lap; using someone's lap for a pillow

knee touch down

to sit knee to knee (with); to sit opposite each other; to have a congenial talk; to have a candid discussion

to fall to one's knees; to go down on one's knees (e.g. to express respect)

popliteal fossa

to express sudden recognition and being impressed; to slap one's knee

to humbly implore; to beg profusely

kneecap; patella

kneecap

one knee