cark (v.)youdaoicibaDictYouDict[cark 词源字典]
"to be weighed down or oppresssed by cares or worries, be concerned about," early 12c., a figurative use, via Anglo-French from Old North French carkier "to load, burden," from Late Latin carcare (see charge (v.)). Compare Old North French carguer "charger," corresponding to Old French chargier. The literal sense in English, "to load, put a burden on," is from c. 1300. Related: Carked; carking. Also as a noun in Middle English and after, "charge, responsibility; anxiety, worry; burden on the mind or spirit," (c. 1300), from Anglo-French karke, from Old North French form of Old French carche, variant of charge "load, burden, imposition." [cark etymology, cark origin, 英语词源]
kite (n.)youdaoicibaDictYouDict
bird of prey (Milvus ictinus), Old English cyta "kind of hawk," probably imitative of its cries (compare ciegan "to call," German Kauz "screech owl"). The toy kite first so-called 1660s, from its way of hovering in the air like a bird. The dismissive invitation to go fly a kite is attested by 1942, American English, probably tracing to the popular song of the same name (lyrics by Johnny Burke), sung by Bing Crosby in "The Star Maker" (1939):
Go fly a kite and tie your troubles to the tail
They'll be blown away by a merry gale,
Go fly a kite and toss your worries to the wind
And they won't come back, they'll be too chagrined.
sheep (n.)youdaoicibaDictYouDict
ruminant mammal, Old English sceap, scep, from West Germanic *skæpan (cognates: Old Saxon scap, Old Frisian skep, Middle Low German schap, Middle Dutch scaep, Dutch schaap, Old High German scaf, German Schaf), of unknown origin. Not found in Scandinavian (Danish has faar for "sheep") or Gothic (which uses lamb), and with no known cognates outside Germanic. The more usual Indo-European word for the animal is represented in English by ewe.

The plural form was leveled with the singular in Old English, but Old Northumbrian had a plural scipo. Used since Old English as a type of timidity and figuratively of those under the guidance of God. The meaning "stupid, timid person" is attested from 1540s. The image of the wolf in sheep's clothing was in Old English (from Matt. vii:15); that of separating the sheep from the goats is from Matt. xxv:33. To count sheep in a bid to induce sleep is recorded from 1854 but seems not to have been commonly written about until 1870s. It might simply be a type of a tedious activity, but an account of shepherd life from Australia from 1849 ["Sidney's Emigrant's Journal"] describes the night-shepherd ("hut-keeper") taking a count of the sheep regularly at the end of his shift to protect against being answerable for any animals later lost or killed.

Sheep's eyes "loving looks" is attested from 1520s (compare West Frisian skiepseach, Dutch schaapsoog, German Schafsauge). A sheep-biter was "a dog that worries sheep" (1540s); "a mutton-monger" (1590s); and "a whore-monger" (1610s, i.e. one who "chases mutton"); hence Shakespeare's sheep-biting "thieving, sneaky."