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authentic [authentic 词源字典]: authentic: [14] Etymologically, something that is authentic is something that has the authority of its original creator. Greek authentikós was a derivative of the noun authéntēs ‘doer, master’, which was formed from autós ‘self’ and the base -hentēs ‘worker, doer’ (related to Sanskrit sanoti ‘he gains’). The adjective’s original meaning in English was ‘authoritative’; the modern sense ‘genuine’ did not develop fully until the late 18th century. (Greek authéntēs, incidentally, was pronounced /afthendis/, and was borrowed into Turkish as efendī, source of English effendi [17].)
=> effendi[authentic etymology, authentic origin, 英语词源]
attrahent (n.): "that which attracts," 1660s, from Latin attrahentem (nominative attrahens), present participle of attrahere (see attract).
authentic (adj.): mid-14c., "authoritative," from Old French autentique (13c., Modern French authentique) "authentic; canonical," and directly from Medieval Latin authenticus, from Greek authentikos "original, genuine, principal," from authentes "one acting on one's own authority," from autos "self" (see auto-) + hentes "doer, being," from PIE *sene- "to accomplish, achieve." Sense of "entitled to acceptance as factual" is first recorded mid-14c.

Traditionally in modern use, authentic implies that the contents of the thing in question correspond to the facts and are not fictitious; genuine implies that the reputed author is the real one; but this is not always maintained: "The distinction which the 18th c. apologists attempted to establish between genuine and authentic ... does not agree well with the etymology of the latter word, and is not now recognized" [OED].
authenticate (v.): "verify, establish the credibility of," 1650s, from Medieval Latin authenticatus, past participle of authenticare, from authenticus (see authentic). Related: Authenticated; authenticating.
authentication (n.): 1788, noun of action from authenticate (v.).
authenticity (n.): 1760; see authentic + -ity. Earlier form was authentity (1650s).
Ghent: city in Flanders, of uncertain origin; perhaps from Celtic *condate "confluence," or from a non-Indo-European word.
inauthentic (adj.): 1783, from in- (1) "not, opposite of" + authentic.
authentical: "Legally valid; possessing legal force. Also of a person: legally or duly qualified. Now rare", Mid 16th cent. From classical Latin authenticus authentic + -al.