cynicyoudaoicibaDictYouDict[cynic 词源字典]
cynic: [16] Originally, the Cynics were a group of ascetic philosophers in ancient Greece. Their founder, around 400 BC, was Antisthenes, a follower of Socrates. They advocated the view that virtue and self-control are the highest good and, particularly under their later leader Diogenes, came to exhibit a contempt for the frailties of their fellow human beings that is traditionally said to have earned them their name: Greek kúōn meant ‘dog’ (it is related to English hound), and the philosophers were allegedly dubbed kunikós on account of their ‘dog-like’ sneering.

A more prosaic but more likely explanation of the term is that it comes from the Kunósarge, the gymnasium where Antisthenes taught (perhaps later influenced by kúōn). English acquired the word via Latin cynicus.

[cynic etymology, cynic origin, 英语词源]
ironyyoudaoicibaDictYouDict
irony: [16] Irony has no etymological connection with iron. It comes via Latin īrōnia from Greek eirōneíā, which signified ‘deliberately pretending ignorance, particularly as a rhetorical device to get the better of one’s opponent in argument’. This was a derivative of eírōn ‘dissembler’, which in turn came from the verb eírein ‘say’. This original sense of ‘dissimulation’ survives in the expression Socratic irony, a reference to Socrates’ use of such feigned ignorance as a pedagogical method, but it has been overtaken as the main sense of the word by ‘saying the opposite of what one means’.
cynic (n.)youdaoicibaDictYouDict
mid-16c., in reference to the ancient philosophy, from Greek kynikos "a follower of Antisthenes," literally "dog-like," from kyon (genitive kynos) "dog" (see canine). Supposedly from the sneering sarcasm of the philosophers, but more likely from Kynosarge "Gray Dog," name of the gymnasium outside ancient Athens (for the use of those who were not pure Athenians) where the founder, Antisthenes (a pupil of Socrates), taught. Diogenes was the most famous. Popular association even in ancient times was "dog-like" (Lucian has kyniskos "a little cynic," literally "puppy"). Meaning "sneering sarcastic person" is from 1590s.
demon (n.)youdaoicibaDictYouDict
c. 1200, from Latin daemon "spirit," from Greek daimon "deity, divine power; lesser god; guiding spirit, tutelary deity" (sometimes including souls of the dead); "one's genius, lot, or fortune;" from PIE *dai-mon- "divider, provider" (of fortunes or destinies), from root *da- "to divide" (see tide (n.)).

Used (with daimonion) in Christian Greek translations and Vulgate for "god of the heathen" and "unclean spirit." Jewish authors earlier had employed the Greek word in this sense, using it to render shedim "lords, idols" in the Septuagint, and Matt. viii:31 has daimones, translated as deofol in Old English, feend or deuil in Middle English. Another Old English word for this was hellcniht, literally "hell-knight."

The original mythological sense is sometimes written daemon for purposes of distinction. The Demon of Socrates was a daimonion, a "divine principle or inward oracle." His accusers, and later the Church Fathers, however, represented this otherwise. The Demon Star (1895) is Algol.
hyperbole (n.)youdaoicibaDictYouDict
early 15c., from Latin hyperbole, from Greek hyperbole "exaggeration, extravagance," related to hyperballein "to throw over or beyond," from hyper- "beyond" + bole "a throwing, a casting, the stroke of a missile, bolt, beam," from bol-, nominative stem of ballein "to throw" (see ballistics). Rhetorical sense is found in Aristotle and Isocrates.
irony (n.)youdaoicibaDictYouDict
c. 1500, from Latin ironia, from Greek eironeia "dissimulation, assumed ignorance," from eiron "dissembler," perhaps related to eirein "to speak" (see verb). Used in Greek of affected ignorance, especially that of Socrates. For nuances of usage, see humor. Figurative use for "condition opposite to what might be expected; contradictory circumstances" is from 1640s.
Platonic (adj.)youdaoicibaDictYouDict
1530s, "of or pertaining to Greek philosopher Plato" (429 B.C.E.-c. 347 B.C.E.), from Latin Platonicus, from Greek Platonikos. The name is Greek Platon, properly "broad-shouldered" (from platys "broad;" see plaice (n.)). His original name was Aristocles. The meaning "love free of sensual desire" (1630s), which the word usually carries nowadays, is a Renaissance notion; it is based on Plato's writings in "Symposium" about the kind of interest Socrates took in young men, which originally had no reference to women. Related: Platonically.
Socratic (adj.)youdaoicibaDictYouDict
1630s (Socratical is from 1580s), "of or pertaining to Greek philosopher Socrates" (469-399 B.C.E.), especially in reference to his method of eliciting truth by question and answer, from Latin Socraticus, from Greek Sokratikos "pertaining to Socrates or his school." His name is Greek Sokrates, literally "having safe might."
XanthippeyoudaoicibaDictYouDict
also (incorrectly) Xantippe, late 16c., spouse of Socrates (5c. B.C.E.), the prototype of the quarrelsome, nagging wife. The name is related to the masc. proper name Xanthippos, a compound of xanthos "yellow" (see xantho-) + hippos "horse" (see equine).