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cool [cool 词源字典]: cool: [OE] Cool comes from the same source as cold, namely Indo-European *gel-, *gol- (from which English also gets congeal, gel, and jelly). The Germanic descendants of this Indo- European base were *kal-, *kōl-. From these were derived the Germanic adjective *kōluz, which passed into Old English as cōl. Its use for ‘fashionable, hip’ is mid-20th-century, but its nonchalant application to large sums of money is of surprisingly long standing: ‘I just made a couple of bets with him, took up a cool hundred, and so went to the King’s Arms’, John Vanbrugh and Colly Cibber, The Provok’d Husband 1728.
=> cold, congeal, gel, jelly[cool etymology, cool origin, 英语词源]
add (v.): late 14c., "to join or unite (something to something else)," from Latin addere "add to, join, attach, place upon," from ad- "to" (see ad-) + -dere comb. form meaning "to put, place," from dare "to give" (see date (n.1)). Meaning "to do sums, do addition" also is from late 14c. Related: Added; adding. To add up "make sense" is from 1942.
cool (adj.): Old English col "not warm" (but usually not as severe as cold), also, of persons, "unperturbed, undemonstrative," from Proto-Germanic *koluz (cognates: Middle Dutch coel, Dutch koel, Old High German kuoli, German kühl "cool," Old Norse kala "be cold"), from PIE root *gel- "cold, to freeze" (see cold (adj.)).

Applied since 1728 to large sums of money to give emphasis to amount. Meaning "calmly audacious" is from 1825. Slang use for "fashionable" is 1933, originally Black English; modern use as a general term of approval is from late 1940s, probably from bop talk and originally in reference to a style of jazz; said to have been popularized in jazz circles by tenor saxophonist Lester Young. Related: Coolly.
Dick Whittington: The story is an old one, told under other names throughout Europe, of a poor boy who sends a cat he had bought for a penny as his stake in a trading voyage; the captain sells it on his behalf for a fortune to a foreign king whose palace is overrun by rats. The hero devotes part of his windfall to charity, which may be why the legend attached in England since 16c. to Sir Richard Whittington (d.1423), three times Lord Mayor of London, who died childless and devoted large sums in his will to churches, almshouses, and St. Bartholomew's Hospital.
high (adj.): Old English heh (Anglian), heah (West Saxon) "of great height, lofty, tall, exalted, high-class," from Proto-Germanic *haukhaz (cognates: Old Saxon hoh, Old Norse har, Danish høi, Swedish hög, Old Frisian hach, Dutch hoog, Old High German hoh, German hoch, Gothic hauhs "high;" also German Hügel "hill," Old Norse haugr "mound"), perhaps related to Lithuanian kaukara "hill." Spelling with -gh represents a final guttural sound in the original word, lost since 14c.

Of sound pitch, late 14c. Of roads, "most frequented or important," c. 1200. Meaning "euphoric or exhilarated from alcohol" is first attested 1620s, of drugs, 1932. Sense of "proud, haughty, arrogant, supercilious" (c. 1200) is reflected in high hand (late 14c.) and high horse. High seas first attested late 14c., with sense (also found in the Latin cognate) of "deep" as well as "tall" (cognates: Old English heahflod "deep water," also Old Persian baršan "height, depth"). Of an evil or a punishment, "grave, serious, severe" (as in high treason), c. 1200 (Old English had heahsynn "deadly sin, crime").

High pressure (adj.) is from 1824, of engines, 1891, of weather systems, 1933, of sales pitches. A child's high chair is from 1848. High school "school for advanced studies" attested from late 15c. in Scotland; by 1824 in U.S. High time "fully time, the fullness of time," is from late 14c. High noon is from early 14c.; the sense is "full, total, complete." High and mighty is c. 1200 (heh i mahhte). High finance (1905) is that concerned with large sums. High and dry of beached things (especially ships) is from 1783. High-water mark is what is left by a flood or highest tide (1550s); figurative use by 1814.
some (adj.): Old English sum "some, a, a certain one, something, a certain quantity; a certain number;" with numerals "out of" (as in sum feowra "one of four"); from Proto-Germanic *suma- (cognates: Old Saxon, Old Frisian, Old High German sum, Old Norse sumr, Gothic sums), from PIE *smm-o-, suffixed form of root *sem- (1) "one," also "as one" (adv.), "together with" (see same). For substitution of -o- for -u-, see come.
The word has had greater currency in English than in the other Teutonic languages, in some of which it is now restricted to dialect use, or represented only by derivatives or compounds .... [OED]
As a pronoun from c. 1100; as an adverb from late 13c. Meaning "remarkable" is attested from 1808, American English colloquial. A possessive form is attested from 1560s, but always was rare. Many combination forms (somewhat, sometime, somewhere) were in Middle English but often written as two words till 17-19c. Somewhen is rare and since 19c. used almost exclusively in combination with the more common compounds; somewho "someone" is attested from late 14c. but did not endure. Scott (1816) has somegate "somewhere, in some way, somehow," and somekins "some kind of a" is recorded from c. 1200. Get some "have sexual intercourse" is attested 1899 in a quote attributed to Abe Lincoln from c. 1840.