1. To remove or take away someone or something by pulling or prying in a violent, wrenching manner. A noun or pronoun is used between "wrench" and "out." He wrenched the gun out of the attacker's hands. Tom raced over and wrenched the child out of the road before she got hit by a car. He reached into the machine and wrenched out the cables supplying power to the motherboard.
2. To obtain or extract something, such as information, from someone or something, especially after much difficulty or persistence. A noun or pronoun can be used between "wrench" and "out." We were finally able to wrench some answers out of the spy we were interrogating. I've never been able to wrench any meaning out of abstract paintings—they always look just like splatters of paint to me. I wrenched out a confession from Tommy after threatening to take his video games away for a year.