膝

knee

lap; knee and thigh (while sitting)

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

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

kneeling

above the knee

on one's lap

knee strike; kneeing

kneecap

near one's knee

(by) one's side; (at) one's hand

place under the protection (of one's parents, etc.); (under) the care (of)

ひざもと only

territory of a powerful person

しっか only

address used after the names of one's parents, grandparents, etc. in a letter

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

knee-length (clothing)

kneecap

to drop to one's knees; to sink to one's knees

Idiomatic expression

to have one's knees be about to give way

to sit at ease

below the knee

knee joint

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

moving forward by sliding on one's knees (in the presence of high-ranking individuals)

kneecap

travelling on foot; journeying on foot; hiking; riding on shank's pony

knee dislocation

making someone's knees bend (by hitting them behind the knees with one's own knees)

kneecap; patella

(sitting) knee-to-knee; face-to-face

kneecap (patellar) reflex