knee genitalia 4 realizations
ACCEPTED Realization 1
Type Polysemy
Language Akkadian
Lexeme birku
Meaning 1 knee našpak birki u aḫi mariṣ
he suffers from limpness of knees and arms
Direction
Meaning 2 (an euphemism for male and female sexual parts) eṭlu dunnamû ša lā išû birkī
a man of low standing, who is impotent (lit. who has no knees)
Reference CAD: b 255
Comment
ACCEPTED Realization 2
Type Polysemy
Language English
Lexeme lap
Meaning 1 knees
Direction
Meaning 2 loins; genitalia
Reference <personally collected data>
Comment

Not exactly the same just as 'knee', but more 'loins'. Meanwhile, in the modern language the meaning of this word have much more sexual connotations.

ACCEPTED Realization 3
Type Polysemy
Language German
Lexeme Schoß
Meaning 1 knees, loins
Direction
Meaning 2 feminine genitalia
Reference <personally collected data>
Comment
ACCEPTED Realization 4
Type Semantic evolution
Language Polish
Lexeme łono
Meaning 1 lap, knees, breast
Direction
Meaning 2 genitalia (obs.)
Reference
Comment Фасмер 517. Нужно проверить польский, я не уверена, правильно ли поняла. МБ.