This is the 2467th most frequent Chinese word.
恶化
To deteriorate or worsen.
In this sentence, '恶化' is used as a verb to indicate the worsening condition of the situation.
局势在恶化中，请积极采取应对措施。
The situation is deteriorating; please actively take countermeasures.
Here, '恶化' serves as a verb reflecting the rapid decline in the patient's health status.
患者的病情突然恶化了，导致紧急送医。
The patient's condition suddenly worsened, leading to an emergency hospitalization.
In this context, '恶化' acts as a noun referring to the process of environmental degradation.