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argosy [argosy 词源字典]: argosy: [16] On the face of it argosy, an archaic term for ‘large merchant ship’, gives every appearance of being connected with the Argonauts, members of the crew of the ship Argo who sailed with Jason in quest of the Golden Fleece; but in fact the words are completely unrelated. When English first acquired argosy, from Italian, it was ragusea, which meant literally ‘vessel from Ragusa’ (an important city and seaport on the Dalmatian coast, now known as Dubrovnik). From the hotchpotch of spellings used in English in the 16th and 17th centuries (including ragusye, rhaguse, argosea, and arguze), argosy finally emerged as victor.
[argosy etymology, argosy origin, 英语词源]
serendipity: serendipity: [18] Serendipity – the ‘faculty of making lucky discoveries’ – was coined in 1754 by the British writer Horace Walpole (1717–97). He took it from The Three Princes of Serendip, the title of a fairy tale whose leading characters, in Walpole’s words, ‘were always making discoveries, by accidents and sagacity, of things they were not in quest of’. (Serendip is an old name for Sri Lanka.)
explore (v.): 1580s, "to investigate, examine," a back-formation from exploration, or else from Middle French explorer (16c.), from Latin explorare "investigate, search out, examine, explore," said to be originally a hunters' term meaning "set up a loud cry," from ex- "out" (see ex-) + plorare "to weep, cry." Compare deplore. Second element also is explained as "to make to flow," from pluere "to flow." Meaning "to go to a country or place in quest of discoveries" is first attested 1610s. Related: Explored; exploring.
serendipity (n.): 1754 (but rare before 20c.), coined by Horace Walpole (1717-92) in a letter to Horace Mann (dated Jan. 28); he said he formed it from the Persian fairy tale "The Three Princes of Serendip," whose heroes "were always making discoveries, by accidents and sagacity, of things they were not in quest of." The name is from Serendip, an old name for Ceylon (modern Sri Lanka), from Arabic Sarandib, from Sanskrit Simhaladvipa "Dwelling-Place-of-Lions Island."
troll (v.): late 14c., "to go about, stroll," later (early 15c.) "roll from side to side, trundle," probably from Old French troller, a hunting term, "wander, to go in quest of game without purpose" (Modern French trôler), from a Germanic source (compare Old High German trollen "to walk with short steps"), from Proto-Germanic *truzlanan.

Sense of "sing in a full, rolling voice" (first attested 1570s) and that of "fish with a moving line" (c. 1600) both are extended technical uses from the general sense of "roll, trundle," the former from "sing in the manner of a catch or round," the latter perhaps confused with trail or trawl. Figurative sense of "to lure on as with a moving bait, entice, allure" is from 1560s. Meaning "to cruise in search of sexual encounters" is recorded from 1967, originally in homosexual slang.