feintyoudaoicibaDictYouDict[feint 词源字典]
feint: The noun feint [17] and the adjective feint [19] are essentially different words, but they have a common ultimate origin. Feint ‘misleading mock attack’ was borrowed from French feinte, a noun use of the feminine form of the past participle of feindre ‘pretend’ (from which English got feign). Feint ‘printed with pale lines’ is an artificial variant of faint introduced in the printing trade in the mid 19th century (and faint itself originally came from the past participle of feindre).
=> faint, feign[feint etymology, feint origin, 英语词源]
feint (n.)youdaoicibaDictYouDict
1670s, "a false show, assumed appearance;" 1680s as "a pretended blow, movement made to deceive an opponent as to the object of an attack," from French feinte "a feint, sham, fabrication, pretense," abstract noun from Old French feint "false, deceitful; sham, artificial; weak, faint, lazy, indolent" (13c.), originally fem. past participle of feindre "pretend, shirk" (see feign).

Borrowed c. 1300 as adjective ("deceitful," also "enfeebled; lacking in courage;" see feint (v.)), but long obsolete in that sense except as a trade spelling of faint among stationers and paper-makers. Also as a noun in Middle English with senses "false-heartedness" (early 14c.), "bodily weakness" (c. 1400).
feint (v.)youdaoicibaDictYouDict
c. 1300, feinten, "to deceive, pretend" (obsolete), also "become feeble or exhausted; to lack spirit or courage," from Middle English feint (adj.) "feigned, false, counterfeit" and directly from Old French feint "false, deceitful; weak, lazy," past participle of feindre "to hesitate, falter; lack courage; feign, pretend, simulate" (see feign). Sense of "make a sham attack, make a pretended blow" is attested by 1833, from the noun (1680s as "a feigned attack"). Related: Feinted; feinting.