knee; (Internet slang) to kneel down (in admiration)

at the knee (in reference to children); (salutation used in letters to parents or grandparents)

to walk on one's knees and bare one's breast (a gesture of deepest apology)

laptop (computer)

lap dance

to bow and bend the knee (idiom); fawning; bending and scraping to curry favor

to sit knee to knee

Achyranthes bidentata (root used in Chinese medicine)

cross-legged

(children) run around parent's knees; fig. to stay to look after one's elderly parents