n.
    - a sudden violent twist or pull.
 - a feeling of abrupt pain and distress caused by one's own or another's departure.
 - an adjustable tool like a spanner, used for gripping and turning nuts or bolts.
 - Mechanics  a combination of a couple with a force along its axis.
 
v.
   - pull or twist suddenly and violently. 
▸injure (a part of the body) as a result of a sudden twisting movement.
 - turn or adjust (a nut or bolt) with a wrench.
 - archaic distort (something) to fit a particular theory or interpretation.
 
 
  Etymology
  OE wrencan ‘twist’, of unknown origin.