genou

du lat. geniculum, diminutif de genu, genou ; allem. Knie ; sanscrit, janu ( a avec un accent long)
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Proto-Indo-European word that had three forms: *genu-, *gonu- and *gnu- (known as ablaut forms). Latin obviously used the first. Greek chose the second for its gonia "angle, corner" found in "diagonal," "orthogonal," and many others referring to angles or corners. English chose the third form, which came into Old English as cneo "knee" and today is spelled "knee" without the [k] sound, lost long ago in the fog of history.zânu (be bâlâ => !)

m diz