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accord (n.)[accord 词源字典]: late 13c., accourd, from Old French acord "agreement," a back-formation from acorder (see accord (v.)).[accord etymology, accord origin, 英语词源]
accordance (n.): c. 1300, "compliance;" early 14c., "agreement, concurrence," from Old French acordance "agreeing, reconciliation, harmony," noun of action from acorder (see accord). Of things, "conformity, compatibility, harmony," late 14c. Phrase in accordance with is attested from c. 1810 (in Middle English, in accordance of was the usual form).
according: c. 1300, "matching, similar, correponding," present participle adjective and adverb from accord (v.). Meanings "conforming (to), compliant, in agreement; consistent, harmonious; suitable, appropriate" are from late 14c. According to "referring to," literally "in a manner agreeing with" is attested from mid-15c.
accordingly (adv.): mid-14c., "in agreement with," from according + -ly (2). From mid-15c. as "properly; adequately;" meaning "in agreement with logic or expectation" is recorded 1680s.
accordion (n.): 1831, from German Akkordion, from Akkord "musical chord, concord of sounds, be in tune" (compare Italian accordare "to attune an instrument"); ultimately from same source as English accord (v.), with suffix on analogy of clarion, etc. Invented 1829 by piano-maker Cyrill Demian (1772-1847) of Vienna.
accost (v.): 1570s, from Middle French accoster "move up to," from Italian accostare or directly from Late Latin accostare "come up to the side," from Latin ad- "to" (see ad-) + costa "rib, side" (see coast (n.)). The original notion is of fleets of warships attacking an enemy's coast. Related: Accosted; accosting.
accouchement (n.): 1803, from French accouchement, noun of action from accoucher (see accoucheur).
accoucheur (n.): 1759, "midwife" (properly, "male midwife"), from French accoucheur (Jules Clément, later 17c.), agent noun from accoucher "to go to childbed, be delivered" (13c.) originally simply "to lie down" (12c.), from Old French culcher "to lie," from Latin collocare, from com- "with" (see com-) + locare "to place" (see locate). The fem. is accoucheuse (1847).
account (n.): c. 1300, "reckoning of money received and paid," from Old French acont "account, reckoning, terminal payment," from a "to" (see ad-) + cont "counting, reckoning of money to be paid," from Late Latin computus "a calculation," from Latin computare "calculate" (see compute).

Meaning "sum of (one's) money in a bank" is from 1833. Sense of "narration" is first attested 1610s. Plural accounts used as a collective or singular in phrases such as to give accounts (of something), is from mid-13c. Phrase by all accounts is attested from 1798.
account (v.): c. 1300, "to count, enumerate," from Old French aconter "to count, render account" (Modern French conter), from a "to" (see ad-) + conter "to count, tell" (see count (v.)). Meaning "to reckon for money given or received, render a reckoning," is from late 14c.; sense of "to explain" (c. 1710) is from notion of "answer for money held in trust." Transferred sense of "value" is from late 14c. Related: Accounted; accounting.
accountability (n.): 1770, from accountable + -ity. Earlier was accountableness (1660s).
accountable (adj.): "answerable," literally "liable to be called to account," c. 1400 (mid-14c. in Anglo-French); see account (v.) + -able. Related: Accountably.
accountancy (n.): 1854, from accountant + -cy.
accountant (n.): mid-15c., "accounting officer, one who renders accounts," from Old French acuntant (Modern French accomptant), from present participle of accompter (see account (v.)). Sense of "professional maker of accounts" is recorded from 1530s. The word also was an adjective in Middle English, "accountable; liable to render accounts" (early 15c.).
accounting (n.): "reckoning of numbers," late 14c., verbal noun from account (v.). Phrase no accounting for tastes (1823) translates Latin de gustibus non est disputandum.
accouter (v.): also accoutre, 1590s, from French acoutrer, earlier acostrer (13c.) "arrange, dispose, put on (clothing)," originally "sew up," from Vulgar Latin accosturare "to sew together, sew up," from Latin ad- "to" (see ad-) + *consutura "a sewing together," from Latin consutus, past participle of consuere "to sew together," from con- (see com-) + suere "to sew" (see suture). Related: Accoutered; accoutred; accoutering; accoutring.
accoutrements (n.): 1540s, from Middle French accoustrement (Modern French accoutrement), from accoustrer probably from Old French acostrer "arrange," originally "sew up" (see accouter)
accredit (v.): 1610s, from French accréditer, from à "to" (see ad-) + créditer "to credit" (someone with a sum), from crédit "credit" (see credit (n.)). Related: Accredited; accrediting.
accreditation (n.): 1806, noun of action from accredit.
accredited (adj.): "furnished with credentials," 1630s, past participle adjective from accredit (v.).