anything so special.
The feminine 'cu' word-base is also the source of the modern 'cow', applied to female animals, one of the earliest recorded forms of which is the Old Frisian 'ku', indicating the link with 'cu'. Other early forms include the Old Saxon 'ko', the Dutch 'koe', the Old Higher German 'kuo' and 'chuo', the German 'kuhe' and 'kuh', the Old Norse 'kyr', the Germanic 'kouz', the Old English 'cy' (also 'cua' and 'cyna'), and the Middle English 'kine' and 'kye'.
The prefix is also been linked to elliptical (thus, perhaps, symbolically vaginal) terms such as 'cucuteni' ('womb-shaped Roman vase'), 'cod' ('bag'), 'cubby-hole' ('snug place'), 'cove' ('concave chamber'), and 'keel' ('convex ridge'). The Italian 'guanto' ('glove') and the Irish 'cuan' ('harbour') may also be related, as they share with 'vagina' the literal meaning 'receptacle'. Even 'cudgel' ('weapon') has been suggested as another link, though a cudgel seems more like a cock than a cunt, and indeed none of these terms have the demonstrably feminine associations of 'cunt' or 'cow'.
'Cu' also has associations with knowledge: 'can' ('to know') evolved from the Middle English 'cunne', 'cunae', and 'cun', which are in turn derived from the Old Frisian 'kunna', the Old Saxon 'cunnan', the Dutch 'kunnen', and the Old Higher German 'kunnan', all of which contain the 'cu'/'ku' prefix. RF Rattray highlights the connection between femininity and knowledge: "The root cu appears in countless words from cowrie, Cypris, down to cow; and the root cun has two lines of descent, the one emphasising the mother and the other knowledge: Cynthia and <...> cunt, on the one hand, and cunning, on the other" (1961).
Indeed, there is a significant linguistic connection between sex and knowledge: one can 'conceive' both an idea and a baby, and 'ken' means both 'know' and 'give birth'. 'Ken' shares a genealogical meaning with 'kin' and 'kind', from the Old English 'cyn' and the Gothic 'kuni'. It also has vaginal connotations: "<'kin'> meant not only matrilineal blood relations but also a cleft or crevice, the Goddess's genital opening" (Barbara G Walker, 1983).
The Latin 'cognoscere', related to 'cognosco', 'cognitum', and 'cognate', may indeed be cognate with the sexual organ 'cunt'. Knowledge-related words such as 'connote', 'canny', and 'cunning' may also be etymologically related to it, though such a connection is admittedly tenuous. Less debatable is the connection between 'cunctipotent' and 'cunt': both are derived from the Latin 'cunnus'. Geoffrey Chaucer's 'cunt'-inspired term 'queynte' is yet another link between sex and knowledge, as he uses it to mean both 'vagina' and 'cunning'.
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http://www.matthewhunt.com/cunt/etymology.html