Writhe (verb)

To twist and turn one's body, especially as a result of pain or emotion.

Origin:

The word "writhe" originated in the late 13th century, it comes from the old english word "writhan" meaning to twist, bend or to contort oneself.

Examples:

1. He writhed in pain on the ground.
2. The snake writhed in the grass.
3. She writhed in disgust at the sight of the insect.
4. He writhed on the floor in agony.
5. She writhed in embarrassment as she realized her mistake.