wrench

/ˈrench/

Middle English, from Old English wrencan; akin to Old High German renken to twist and perhaps to Latin vergere to bend, incline

verb

  1. to move with a violent twist; also : to undergo twisting

  2. to pull or strain at something with violent twisting

  3. to twist violently

noun

  1. a violent twisting or a pull with or as if with twisting

  2. a sharp twist or sudden jerk straining muscles or ligaments; also : the resultant injury (as of a joint)

  3. a distorting or perverting alteration

noun

  1. an L-shaped hexagonal metal bar either end of which fits the socket of a screw or bolt