Convulse (verb)

1. To experience violent muscle contractions and spasms.
2. To experience a sudden, violent reaction or emotion.

Origin:

From the latin word "convulsus" meaning "to shake violently".

Examples:

1. The patient's body convulsed as the seizure took hold.
2. The crowd convulsed with laughter at the comedian's jokes.
3. The stock market convulsed as investors panicked.
4. The patient convulsed in pain as the needle was inserted.
5. The volcano convulsed, throwing ash and lava into the air.