cloveyoudaoicibaDictYouDict[clove 词源字典]
clove: There are two distinct words clove in English. In clove of garlic [OE] the underlying notion is of ‘cutting’; the head of garlic is as it were ‘divided up’ into separate sections. The word goes back ultimately to the Indo-European base *gleubh- ‘cut, carve’, which also produced English cleave and its now archaic past tense clove. Clove the spice [14] originated in the Old French phrase clou de girofle, which meant literally ‘nail of the clove-tree’.

The term ‘nail’ was applied to the tree’s dried unopened flower bud because of a perceived resemblance in shape. (French clou ‘nail’ comes from Latin clāvus, source of English cloy, and French girofle – whence English gillyflower [14], which originally meant ‘clove’ – goes back via medieval Latin caryophyllum to Greek karuóphullon, which literally meant ‘nut leaf’.)
=> cleave; cloy, gillyflower[clove etymology, clove origin, 英语词源]
clove (n.1)youdaoicibaDictYouDict
dried flowerbud of a certain tropical tree, used as a spice, late 15c., earlier clowes (14c.), from Anglo-French clowes de gilofre (c. 1200), Old French clou de girofle "nail of gillyflower," so called from its shape, from Latin clavus "a nail" (see slot (n.2)). For second element, see gillyflower. The two cloves were much confused in Middle English. The clove pink is so called from the scent of the flowers.
clove (n.2)youdaoicibaDictYouDict
"slice of garlic," Old English clufu "clove (of garlic), bulb, tuber," from Proto-Germanic *klubo "cleft, thing cloven," from PIE *gleubh- "to tear apart, cleave" (see cleave (v.1)). Its Germanic cognates mostly lurk in compounds that translate as "clove-leek," such as Old Saxon clufloc, Old High German chlobilouh. Dissimilation produced Dutch knoflook, German knoblauch.