ephialtes (n.)youdaoicibaDictYouDict[ephialtes 词源字典]
nightmare or demon that causes nightmares, c. 1600, from Greek Ephialtes, name of a demon supposed to cause nightmares; the ancient explanation is that it was from ephallesthai "to leap upon," which suits the sense, but OED finds "considerable" phonological difficulties with this.[ephialtes etymology, ephialtes origin, 英语词源]
exult (v.)youdaoicibaDictYouDict
1560s, "to leap up;" 1590s, "to rejoice, triumph," from Middle French exulter, from Latin exultare/exsultare "rejoice exceedingly, revel, vaunt, boast;" literally "leap about, leap up," frequentative of exsilire "to leap up," from ex- "out" (see ex-) + salire "to leap" (see salient (adj.)). The notion is of leaping or dancing for joy. Related: Exulted; exulting.
insult (v.)youdaoicibaDictYouDict
1560s, "triumph over in an arrogant way," from Middle French insulter (14c.) and directly from Latin insultare "to assail, to leap upon" (already used by Cicero in sense of "insult, scoff at, revile"), frequentative of insilire "leap at or upon," from in- "on, at" (see in- (2)) + salire "to leap" (see salient (adj.)). Sense of "to verbally abuse, affront, assail with disrespect" is from 1610s. Related: Insulted; insulting.
start (v.)youdaoicibaDictYouDict
Old English *steortian, *stiertan, Kentish variants of styrtan "to leap up" (related to starian "to stare"), from Proto-Germanic *stert- (cognates: Old Frisian stirta "to fall, tumble," Middle Dutch sterten, Dutch storten "to rush, fall," Old High German sturzen, German stürzen "to hurl, throw, plunge"), of uncertain origin. According to Watkins, the notion is "move briskly, move swiftly," and it is from PIE root *ster- (1) "stiff."

From "move or spring suddenly," sense evolved by late 14c. to "awaken suddenly, flinch or recoil in alarm," and by 1660s to "cause to begin acting or operating." Meaning "begin to move, leave, depart" (without implication of suddenness) is from 1821. The connection probably is from sporting senses ("to force an animal from its lair," late 14c.). Transitive sense of "set in motion or action" is from 1670s; specifically as "to set (machinery) in action" from 1841.

Related: Started; starting. To start something "cause trouble" is 1915, American English colloquial. To start over "begin again" is from 1912. Starting-line in running is from 1855; starting-block in running first recorded 1937.