wrench

Concise Oxford English Dictionary © 2008 Oxford University Press:
wrench/rentʃ/

▶noun

• 1 a sudden violent twist or pull.

• 2 a feeling of abrupt pain and distress caused by one's own or another's departure.

• 3 an adjustable tool like a spanner, used for gripping and turning nuts or bolts.

• 4 Mechanics a combination of a couple with a force along its axis.

▶verb

• 1 pull or twist suddenly and violently.

  ■ injure (a part of the body) as a result of a sudden twisting movement.

• 2 turn or adjust (a nut or bolt) with a wrench.

• 3 archaic distort (something) to fit a particular theory or interpretation.

– origin OE wrencan ‘twist’, of unknown origin.