The Vietnamese word "kinh phong" refers to an "epileptic convulsion," which is a sudden, uncontrolled electrical disturbance in the brain that can cause changes in behavior, movements, feelings, and consciousness. This condition is often associated with epilepsy, a neurological disorder.
In more advanced discussions, you might encounter phrases like "cơn kinh phong" which means "a seizure" or "cơn động kinh," which also refers to a convulsive episode.
While "kinh phong" primarily refers to epileptic convulsions, it may sometimes be used more generally in medical contexts to describe any sudden, severe shaking or spasm of the body.