a wrenching movement; a sudden, violent twist: With a quick wrench, she freed herself.
8.
a painful, straining twist, as of the ankle or wrist.
9.
a sharp, distressing strain, as to the feelings.
10.
a twisting or distortion, as of meaning.
11.
a tool for gripping and turning or twisting the head of a bolt, a nut, a pipe, or the like, commonly consisting of a bar of metal with fixed or adjustable jaws.
Origin: before 1050; Middle English wrenchen (v.), Old English wrencan to twist, turn; cognate with German renken
n. a mechanic. (Possibly from Mr. Goodwrench.) : I gotta get my ride in and have a wrench look at the serpentine.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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