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grapple (v.)[grapple 词源字典]: 1520s, "seize and hold fast," originally in reference to a ship, by means of a grapple, from grapple (n.). Extended sense of "battle, struggle in close contact" (usually with with) is from 1580s of persons, 1630s of immaterial things. Related: Grappled; grappling. Grappling hook is from 1620s.[grapple etymology, grapple origin, 英语词源]
grappler (n.): 1620s, "a grappling hook," agent noun from grapple (v.). Of a person, by 1832.
harpoon (n.): 1610s, from French harpon, from Old French harpon "cramp iron, clamp, clasp" (described as a mason's tool for fastening stones together), from harper "to grapple, grasp," which is of uncertain origin. It is possibly of Germanic origin; or the French word might be from Latin harpa "hook" (related to harpagonem "grappling hook"), from Greek harpe "sickle," from PIE root *serp- (1) "sickle, hook." Earlier word for it was harping-iron (mid-15c.). Sense and spelling perhaps influenced by Dutch (compare Middle Dutch harpoen) or Basque, the language of the first European whaling peoples, who often accompanied English sailors on their early expeditions. Also see -oon.
wrestling (n.): Old English wræstlung, "sport of grappling and throwing," verbal noun from wrestle (v.). From c. 1300 as "action of wrestling, a wrestling match." Figurative use from c. 1200.