c. 1300, countrefeten, "pretend to be," from countrefet (adj.), Old French contrefait "imitated" (Modern French contrefait), past participle of contrefaire "imitate," from contre- "against" (see contra-) + faire "to make, to do" (from Latin facere "to make, do," from PIE root *dhe- "to set, put").
From late 14c. as "assume, simulate" (a feeling, quality, etc.); also "to make a copy of, imitate without authority or right," especially with a view to deceive or defraud. Medieval Latin contrafactio meant "setting in opposition or contrast." Related: Counterfeited; counterfeiting.
late 14c. (late 13c. in Anglo-French), countrefet, "spurious, forged, made in semblance of an original with a view to defraud," also "feigned, simulated, hypocritical," from Old French contrefait "imitated" (Modern French contrefait), past participle of contrefaire "imitate," from contre- "against" (see contra (prep., adv.)) + faire "to make, to do" (from Latin facere "to make, do," from PIE root *dhe- "to set, put").
As a noun, "an imitation or copy designed to pass as an original," late 14c., from the adjective.
early 15c., "one who imitates or makes a copy of," especially with intent to deceive or defraud, agent noun from counterfeit (v.).
"act or fact of feigning or making a copy of," especially with intent to deceive or defraud; verbal noun from counterfeit (v.). Earlier was counterfeiture (early 14c.).
*dhē-, Proto-Indo-European root meaning "to set, put."
It forms all or part of: abdomen; abscond; affair; affect (v.1) "make a mental impression on;" affect (v.2) "make a pretense of;" affection; amplify; anathema; antithesis; apothecary; artifact; artifice; beatific; benefice; beneficence; beneficial; benefit; bibliothec; bodega; boutique; certify; chafe; chauffeur; comfit; condiment; confection; confetti; counterfeit; deed; deem; deface; defeasance; defeat; defect; deficient; difficulty; dignify; discomfit; do (v.); doom; -dom; duma; edifice; edify; efface; effect; efficacious; efficient; epithet; facade; face; facet; facial; -facient; facile; facilitate; facsimile; fact; faction (n.1) "political party;" -faction; factitious; factitive; factor; factory; factotum; faculty; fashion; feasible; feat; feature; feckless; fetish; -fic; fordo; forfeit; -fy; gratify; hacienda; hypothecate; hypothesis; incondite; indeed; infect; justify; malefactor; malfeasance; manufacture; metathesis; misfeasance; modify; mollify; multifarious; notify; nullify; office; officinal; omnifarious; orifice; parenthesis; perfect; petrify; pluperfect; pontifex; prefect; prima facie; proficient; profit; prosthesis; prothesis; purdah; putrefy; qualify; rarefy; recondite; rectify; refectory; sacrifice; salmagundi; samadhi; satisfy; sconce; suffice; sufficient; surface; surfeit; synthesis; tay; ticking (n.); theco-; thematic; theme; thesis; verify.
It is the hypothetical source of/evidence for its existence is provided by: Sanskrit dadhati "puts, places;" Avestan dadaiti "he puts;" Old Persian ada "he made;" Hittite dai- "to place;" Greek tithenai "to put, set, place;" Latin facere "to make, do; perform; bring about;" Lithuanian dėti "to put;" Polish dziać się "to be happening;" Russian delat' "to do;" Old High German tuon, German tun, Old English don "to do."
1927, originally hobo slang, "counterfeit seizures induced to attract sympathy;" meaning "energetic celebration" is by 1949. As a type of dingbat fonts made by Microsoft, from 1990.
mid-15c., falsifien, "to prove false," from Old French falsifier "to falsify, counterfeit" (15c.), from Late Latin falsificare "make false, corrupt," from Latin falsus "erroneous, mistaken" (see false). Meaning "to make false" is from c. 1500. Earlier verb was simply falsen (c. 1200). Related: Falsified; falsifying.