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Origin and history of affidavit

affidavit(n.)

"written declaration upon an oath," 1590s, from Medieval Latin affidavit, literally "he has stated on oath," third person singular perfective of affidare "to trust; to make an oath," from Latin ad "to" (see ad-) + fidare "to trust," from fidus "faithful" (from PIE root *bheidh- "to trust, confide, persuade"). So called from being the first word of sworn statements.

also from 1590s

Entries linking to affidavit

ad-

word-forming element expressing direction toward or in addition to, from Latin ad "to, toward" in space or time; "with regard to, in relation to," as a prefix, sometimes merely emphatic, from PIE root *ad- "to, near, at."

Simplified to a- before sc-, sp- and st-; modified to ac- before many consonants and then re-spelled af-, ag-, al-, etc., in conformity with the following consonant (as in affection, aggression). Also compare ap- (1).

In Old French, reduced to a- in all cases (an evolution already underway in Merovingian Latin), but French refashioned its written forms on the Latin model in 14c., and English did likewise 15c. in words it had picked up from Old French. In many cases pronunciation followed the shift.

Over-correction at the end of the Middle Ages in French and then English "restored" the -d- or a doubled consonant to some words that never had it (accursed, afford). The process went further in England than in France (where the vernacular sometimes resisted the pedantic), resulting in English adjourn, advance, address, advertisement (Modern French ajourner, avancer, adresser, avertissement). In modern word-formation sometimes ad- and ab- are regarded as opposites, but this was not in classical Latin.

*bheidh-

Proto-Indo-European root meaning "to trust, confide, persuade."

It might form all or part of: abide; abode; affiance; affidavit; auto-da-fe; bide; bona fide; confederate; confidant; confide; confidence; confident; defiance; defy; diffidence; diffident; faith; fealty; federal; federate; federation; fiancee; fideism; fidelity; fiducial; fiduciary; infidel; infidelity; nullifidian; perfidy; solifidian.

It might also be the source of: Greek pistis "faith, confidence, honesty;" Latin fides "trust, faith, confidence, reliance, credence, belief;" Albanian be "oath," bindem "to be convinced, believe;" Old Church Slavonic beda "distress, necessity," bediti "to force, persuade;" Old English biddan "to ask, beg, pray," German bitten "to ask."

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    verdict
    English verdit (c. 1300), "a jury's decision in a case," from Anglo-French verdit (Old French voirdit) "sworn testimony, affidavit...
    instrument
    late 13c., "musical instrument, mechanical apparatus for producing musical sounds," from Old French instrument, enstrument "means, device; musical instrument" (14c., earlier estrument, 13c.) and directly from Latin instrumentum "a tool, an implement; means, furtherance; apparatus
    testimony
    c. 1400, "proof or demonstration of some fact, evidence, piece of evidence;" early 15c., "legal testimony, sworn statement of a witness," from Old North French testimonie (Old French testimoine 11c.), from Latin testimonium "evidence, proof, witness, attestation," from testis "a
    offspring
    Old English ofspring "children or young collectively, descendants," literally "those who spring off (someone)," from of "away, away from" (see off (prep.)) + springan "to spring" (see spring (v.)). Similar formation in Old Norse afspringr. The figurative sense "that which is prod
    avail
    c. 1300, availen, "to help (someone), assist; benefit, be profitable to; be for the advantage of; have force or efficacy, serve for a purpose," apparently an Anglo-French compound of Old French a- "to" (see ad-) + vaill-, present stem of valoir "be worth," from Latin valere "be s
    consume
    late 14c., "to destroy by separating into parts which cannot be reunited, as by burning or eating," hence "destroy the substance of, annihilate," from Old French consumer "to consume" (12c.) and directly from Latin consumere "to use up, eat, waste," from assimilated form of com-,
    pretty
    Middle English pratie "cunning, crafty, clever" (c. 1300 as a surname), from Old English prættig (West Saxon), pretti (Kentish), *prettig (Mercian) "cunning, skillful, artful, wily, astute," from prætt, *prett "a trick, wile, craft," from Proto-Germanic *pratt- (source also of Ol
    poindexter
    "nerdy intellectual," by 1986, U.S. teenager slang, from the character Poindexter, introduced 1959 in the made-for-TV cartoon version of "Felix the Cat." The name originally was a surname, said to be Norman. There is a rare name Poindexter, appearing in French as Poingdestre, "r
    arcane
    "hidden, secret," 1540s, from Latin arcanus "secret, hidden, private, concealed," from arcere "to close up, enclose, contain," from arca "chest, box, place for safe-keeping," from PIE root *ark- "to hold, contain, guard" (source also of Greek arkos "defense," arkein "to ward off;
    handicap
    1650s, from hand in cap, a game whereby two bettors would engage a neutral umpire to determine the odds in an unequal contest. The bettors would put their hands holding forfeit money into a hat or cap. The umpire would announce the odds and the bettors would withdraw their hands

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