Wrench

1. Any of various hand or power tools with fixed or adjustable jaws for gripping, turning, or twisting objects such as nuts, bolts, or pipes. We used a pipe wrench to install the facet.
2. An injury produced by twisting or straining. He wrenched his back lifting the heavy tree trunk.
3. To force free by pulling at; yank. With great effort he wrenched the post from the ground.
4. A break or parting that causes emotional distress. She felt a wrench when she was parted from her children.