ecstasyyoudaoicibaDictYouDict[ecstasy 词源字典]
ecstasy: [14] Etymologically, someone who is ecstatic is out of his or her mind. The word comes, via Old French extasie and late Latin extasis, from Greek ékstasis, a derivative of the verb existánai ‘displace, drive out of one’s mind’. This was a compound formed from the prefix ek- ‘out’ and histánai ‘place’ (a distant relative of English stand).

The underlying notion of being ‘beside oneself, in the grip of extreme passion’ survives in modern English in relation to mystic experiences or trances, and also, albeit archaically, in such phrases as ‘an ecstasy of rage’, and the specific sense ‘delight’ developed only comparatively recently, apparently in the 17th century.
=> stand[ecstasy etymology, ecstasy origin, 英语词源]
ecstasy (n.)youdaoicibaDictYouDict
late 14c., extasie "elation," from Old French estaise "ecstasy, rapture," from Late Latin extasis, from Greek ekstasis "entrancement, astonishment, insanity; any displacement or removal from the proper place," in New Testament "a trance," from existanai "displace, put out of place," also "drive out of one's mind" (existanai phrenon), from ek "out" (see ex-) + histanai "to place, cause to stand," from PIE root *sta- "to stand" (see stet).

Used by 17c. mystical writers for "a state of rapture that stupefied the body while the soul contemplated divine things," which probably helped the meaning shift to "exalted state of good feeling" (1610s). Slang use for the drug 3,4-methylendioxymethamphetamine dates from 1985. Formerly also spelled ecstasie, extacy, extasy, etc. Attempts to coin a verb to go with it include ecstasy (1620s), ecstatize (1650s), ecstasiate (1823), ecstasize (1830).