Definition: to become worse or to make something become worse Level: C1
政治局势一夜之间恶化了。
The political situation ___worsened overnight.
这座城市的空气质量在过去十年里持续恶化。
Air quality in the city has steadily ___worsened over the past decade.
她轻率的言论使原本就紧张的气氛更加恶化。
Her careless remarks ___worsened the already tense atmosphere.
