zuru verb, intransitive verb
grow in intensity; get worse; develop
Rare zuru-verb (alternative form of 高じる). Describes a condition, emotion, or situation intensifying, often negatively. Used in literary or formal contexts.
See also: 高じる
病が高じて入院することになった。
His illness worsened, and he ended up being hospitalized.
議論が高じて喧嘩になった。
The argument escalated into a fight.