jerk (v.1)youdaoicibaDictYouDict[jerk 词源字典]
"to pull," 1540s, "to lash, strike as with a whip," of uncertain origin, perhaps echoic. Related: Jerked; jerking.[jerk etymology, jerk origin, 英语词源]
jerk (v.2)youdaoicibaDictYouDict
as a method of preserving meat, 1707, American English, from American Spanish carquear, from charqui (see jerky). Related: Jerked.
jerky (n.)youdaoicibaDictYouDict
1850, American English, from American Spanish charqui "jerked meat," from Quechua (Inca) ch'arki "dried flesh."
sparse (adj.)youdaoicibaDictYouDict
1727, from Latin sparsus "scattered," past participle of spargere "to scatter, spread," from PIE root *(s)preg- (2) "to jerk, scatter" (cognates: Sanskrit parjanya- "rain, rain god," Avestan fra-sparega "branch, twig," literally "that which is jerked off a tree," Old Norse freknur "freckles," Swedish dialectal sprygg "brisk, active," Lithuanian sprogti "shoot, bud," Old Irish arg "a drop"). The word is found earlier in English as a verb, "to scatter abroad" (16c.). Related: Sparsely; sparseness.