WRENCH

[noun] [C]A wrench is a sudden, violent twist or pull.He freed the pole with a wrench.If the act of leaving someone or somewhere is a wrench, it is difficult to do because it makes you unhappy.It was a wrench when the time came to part company with his family.(esp. US) Wrench is another word for spanner, esp. one which can be made larger or smaller for holding and turning objects of different sizes.an adjustable wrenchSee also monkey wrench.