suck v.

"to sip, to take into the mouth with the lips," Old English supan (West Saxon), suppan, supian (Northumbrian) "to sip, taste, drink, swallow" (strong verb, past tense seap, past participle sopen), from Proto-Germanic *supanan (source also of Old Norse supa "to sip, drink," Middle Low German supen, Dutch zuipen "to drink, tipple," Old High German sufan, German saufen "to drink, booze"), from PIE *sub-, possibly an extended form of root *seue- (2) "to take liquid" (source also of Sanskrit sunoti "presses out juice," soma; Avestan haoma, Persian hom "juice;" Greek huetos "rain," huein "to rain;" Latin sugere "to suck," succus "juice, sap;" Lithuanian sula "flowing sap;" Old Church Slavonic soku "sap," susati "suck;" Middle Irish suth "sap;" Old English seaw "sap").

c. 1300, hunisuccle "clover, red clover;" c. 1400 in reference to the common climbing vine with abundant fragrant flowers; diminutive of Middle English honeysouke, hunisuge (c. 1300), from Old English hunigsuge, meaning perhaps honeysuckle, clover, wild thyme, or privet, literally "honey-suck" (see honey (n.) + suck) + diminutive suffix -el (2). So called because "honey" can be sucked from it (by bees or persons). In Middle English sometimes a confused rendering of Latin locusta, taken as the name of a plant eaten by St. John the Baptist in the wilderness, thence "a locust."

So eet Baptist eerbis and hony. Sum men seien þat locusta is a litil beest good to ete; Sum seien it is an herbe þat gederiþ hony upon him; but it is licli þat it is an herbe þat mai nurishe men, þat þei clepen hony soukil, but þis þing varieþ in many contrees. ["Wycliffite Sermons," c. 1425]