capital (n.1)youdaoicibaDictYouDict[capital 词源字典]
early 15c., "a capital letter," from capital (adj.). The meaning "capital city" is first recorded 1660s (the Old English word was heafodstol). The financial sense is from 1610s (Middle English had chief money "principal fund," mid-14c.), from Medieval Latin capitale "stock, property," noun use of neuter of capitalis "capital, chief, first." (The noun use of this adjective in classical Latin was for "a capital crime.")
[The term capital] made its first appearance in medieval Latin as an adjective capitalis (from caput, head) modifying the word pars, to designate the principal sum of a money loan. The principal part of a loan was contrasted with the "usury"--later called interest--the payment made to the lender in addition to the return of the sum lent. This usage, unknown to classical Latin, had become common by the thirteenth century and possibly had begun as early as 1100 A.D., in the first chartered towns of Europe. [Frank A. Fetter, "Reformulation of the Concepts of Capital and Income in Economics and Accounting," 1937, in "Capital, Interest, & Rent," 1977]
Also see cattle, and compare sense development of fee, pecuniary.[capital etymology, capital origin, 英语词源]
capitulum (n.)youdaoicibaDictYouDict
used in various senses in English; Latin, literally "little head," diminutive of caput "head," also "leader, guide, chief person; summit; capital city; origin, source, spring," figuratively "life, physical life;" in writing "a division, paragraph;" of money, "the principal sum," from PIE *kaput- "head" (see head (n.)).
chief (adj.)youdaoicibaDictYouDict
c. 1300, "highest in rank or power; most important or prominent; supreme, best," from Old French chief "chief, principal, first" (10c., Modern French chef), from Vulgar Latin *capum (also source of Spanish and Portuguese cabo, Italian capo, Provençal cap), from Latin caput "head," also "leader, guide, chief person; summit; capital city" (see capitulum).
chief (n.)youdaoicibaDictYouDict
c. 1300, "head, leader, captain; the principal or most important part of anything;" from Old French chief "leader, ruler, head" of something, "capital city" (10c., Modern French chef), from Vulgar Latin *capum, from Latin caput "head," also "leader, chief person; summit; capital city" (see capitulum). Meaning "head of a clan" is from 1570s; later extended to American Indian tribes. Commander-in-chief attested from 1660s.
HavanayoudaoicibaDictYouDict
Cuban capital city, founded 1514 by Diego Velázquez as San Cristóbal de la Habana "St. Christopher of the Habana," apparently the name of a local native people. The Spanish adjective form is Habanero. Meaning "cigar made in Havana" is by 1826.
head (n.)youdaoicibaDictYouDict
Old English heafod "top of the body," also "upper end of a slope," also "chief person, leader, ruler; capital city," from Proto-Germanic *haubudam (cognates: Old Saxon hobid, Old Norse hofuð, Old Frisian haved, Middle Dutch hovet, Dutch hoofd, Old High German houbit, German Haupt, Gothic haubiþ "head"), from PIE *kaput- "head" (cognates: Sanskrit kaput-, Latin caput "head").

Modern spelling is early 15c., representing what was then a long vowel (as in heat) and remained after pronunciation shifted. Of rounded tops of plants from late 14c. Meaning "origin of a river" is mid-14c. Meaning "obverse of a coin" (the side with the portrait) is from 1680s; meaning "foam on a mug of beer" is first attested 1540s; meaning "toilet" is from 1748, based on location of crew toilet in the bow (or head) of a ship.

Synechdochic use for "person" (as in head count) is first attested late 13c.; of cattle, etc., in this sense from 1510s. As a height measure of persons, from c. 1300. Meaning "drug addict" (usually in a compound with the preferred drug as the first element) is from 1911.

To be over (one's) head "beyond one's comprehension" is by 1620s. To give head "perform fellatio" is from 1950s. Phrase heads will roll "people will be punished" (1930) translates Adolf Hitler. Head case "eccentric or insane person" is from 1979. Head game "mental manipulation" attested by 1972.
KuwaityoudaoicibaDictYouDict
Persian Gulf country, named for its capital city (said to have been founded in current form 1705), which is from Arabic al-kuwayt, diminutive of kut, a word used in southern Iraq and eastern Arabia for a fortress-like house surrounded by a settlement and protected by encircling water, and said to be ultimately from Persian. Related: Kuwaiti.
metropolis (n.)youdaoicibaDictYouDict
"seat of a metropolitan bishop," 1530s, from Late Latin metropolis; see metropolitan. Meaning "chief town or capital city of a province" is first attested 1580s, earlier metropol (late 14c.).
metropolitan (n.)youdaoicibaDictYouDict
early 15c., "bishop having oversight of other bishops," from Late Latin metropolitanus, from Greek metropolis "mother city" (from which others have been colonized), also "capital city," from meter "mother" (see mother (n.1)) + polis "city" (see polis).

In Greek, "parent state of a colony;" later, "see of a metropolitan bishop." In the West, the position now roughly corresponds to archbishop, but in the Greek church it ranks above it.
metropolitan (adj.)youdaoicibaDictYouDict
1540s, "belonging to an ecclesiastical metropolis," from Late Latin metropolitanus, from Greek metropolites "resident of a city," from metropolis (see metropolitan (n.)). Meaning "belonging to a chief or capital city" is from 1550s. In reference to underground city railways, it is attested from 1867.
Sabean (n.)youdaoicibaDictYouDict
inhabitant of the region of Arabia now known as Yemen, from Latin Sabaeus, from Greek Sabaios "the people of Saba," the region's capital city, from Arabic Saba'. In ancient times it was an important transit point for spices, perfumes, precious stones, etc., imported to Europe from India.
StockholmyoudaoicibaDictYouDict
capital city of Sweden; it arose mid-13c. from a fishing village; the second element in the name is holm "island" (see holm); the first is either stäk "bay" or stock "stake, pole." Related: Stockholmer.

Stockholm Syndrome is from 1978, a psychologists' term; the name derives from the Aug. 23, 1973, violent armed robbery of Sveriges Kreditbank in Stockholm, after which four bank employees were held hostage in a vault for more than five days. The hostages developed a dramatic attachment to their abuser, and a fear of would-be rescuers, that they could not explain.
PekingologistyoudaoicibaDictYouDict
"A person who studies Chinese politics or current affairs", 1960s; earliest use found in The Economist. From Peking, the name of the capital city of China + -ologist; compare Pekingology.