godan verb (-ru), intransitive verb
bend sharply; twist; contort; curl
Colloquial intransitive verb describing something becoming sharply bent, twisted, or curled out of its normal shape. Often used for physical objects, but can also describe a person's body or expression contorting.
針金がひん曲がって使えなくなった。
The wire got bent sharply and became unusable.
His face contorted with anger.