AchillesyoudaoicibaDictYouDict[Achilles 词源字典]
Greek hero of the Trojan War stories, son of Thetis and Peleus, his name is perhaps a compound of akhos "pain, grief" (see awe) + laos "the people, a people" (see lay (adj.)); or else it is from a pre-Greek language.[Achilles etymology, Achilles origin, 英语词源]
biblioklept (n.)youdaoicibaDictYouDict
1881, from biblio- + Greek kleptes "thief" (see kleptomania). Walsh calls it "a modern euphemism which softens the ugly word book-thief by shrouding it in the mystery of the Greek language."
cycad (n.)youdaoicibaDictYouDict
1845, Modern Latin, from Greek kykas, a word found in Theophrastus, but now thought to be a scribal error for koikas "palm trees," accusative plural of koix, a word from an unknown non-Greek language.
Elysium (n.)youdaoicibaDictYouDict
1590s, from Latin Elysium, from Greek Elysion (pedion) "Elysian field," abode of the blessed after death, where heroes and the virtuous dwell, which is of unknown origin, perhaps from a pre-Greek language. Also used figuratively of a situation of complete happiness.
giant (n.)youdaoicibaDictYouDict
c. 1300, "fabulous man-like creature of enormous size," from Old French geant, earlier jaiant "giant, ogre" (12c.), from Vulgar Latin *gagantem (nominative gagas), from Latin gigas "a giant," from Greek Gigas (usually in plural, Gigantes), one of a race of divine but savage and monstrous beings (personifying destructive natural forces), sons of Gaia and Uranus, eventually destroyed by the gods. The word is of unknown origin, probably from a pre-Greek language. Derivation from gegenes "earth-born" is considered untenable.
In þat tyme wer here non hauntes Of no men bot of geauntes. [Wace's Chronicle, c. 1330]
It replaced Old English ent, eoten, also gigant (from Latin). The Greek word was used in Septuagint to refer to men of great size and strength, hence the expanded use in modern languages; in English of very tall and unusually large persons from 1550s; of persons who have any quality in extraordinary degree from 1530s. As a class of stars, from 1912. As an adjective from early 15c. Giant-killer is from 1726.
Greek (n.)youdaoicibaDictYouDict
Old English Grecas, Crecas (plural) "Greeks, inhabitants of Greece," early Germanic borrowing from Latin Graeci "the Hellenes," apparently from Greek Graikoi. Aristotle, who was the first to use Graikhos as equivalent to Hellenes ("Meteorologica" I.xiv), wrote that it was the name originally used by Illyrians for the Dorians in Epirus, from Graii, native name of the people of Epirus.

But a modern theory (put forth by German classical historian Georg Busolt, 1850-1920), derives it from Graikhos "inhabitant of Graia" (literally "gray," also "old, withered"), a town on the coast of Boeotia, which was the name given by the Romans to all Greeks, originally to the Greek colonists from Graia who helped found Cumae (9c. B.C.E.), the important city in southern Italy where the Latins first encountered Greeks. Under this theory, it was reborrowed in this general sense by the Greeks.

The Germanic languages originally borrowed the word with an initial "-k-" sound (compare Old High German Chrech, Gothic Kreks), which probably was their initial sound closest to the Latin "-g-" at the time; the word was later refashioned. From late 14c. as "the Greek language." Meaning "unintelligible speech, gibberish, any language of which one is ignorant" is from c. 1600. Meaning "member of a Greek-letter fraternity" is student slang, 1884.
It was subtle of God to learn Greek when he wished to become an author -- and not to learn it better. [Nietzsche, "Beyond Good and Evil," 1886]
Greek (adj.)youdaoicibaDictYouDict
late 14c., "of Greece or its people," from Greek (n.). Earlier Gregeis (c. 1200), from Old French Gregois; also Greekish (Old English Grecisc). From 1540s as "of the Greek language;" 1550s as "of the Eastern Church." From 1888 as "of Greek-letter fraternities." In venery, "anal," by 1970. Greek fire "inflammable substance invented 7c. by Callinicus of Heliopolis and used by the Byzantines (who in the Middle Ages were known as 'Greeks')" is from c. 1400, earlier Grickisce fure (c. 1200). Greek gift is from "Æneid," II.49: "timeo Danaos et dona ferentes."
labyrinth (n.)youdaoicibaDictYouDict
c. 1400, laberynthe (late 14c. in Latinate form laborintus) "labyrinth, maze," figuratively "bewildering arguments," from Latin labyrinthus, from Greek labyrinthos "maze, large building with intricate passages," especially the structure built by Daedelus to hold the Minotaur near Knossos in Crete, from a pre-Greek language; perhaps related to Lydian labrys "double-edged axe," symbol of royal power, which fits with the theory that the labyrinth was originally the royal Minoan palace on Crete and meant "palace of the double-axe." Used in English for "maze" early 15c., and in figurative sense of "confusing state of affairs" (1540s).