godan verb (-ku), intransitive verb
Describes a dull, persistent physical pain, often with a pulsing sensation. Commonly used for toothaches, headaches, or old injuries.
虫歯がうずいて眠れない。
My cavity is throbbing and I can't sleep.
古傷が雨の日にうずく。
My old injury aches on rainy days.
godan verb (-ku), intransitive verb
rankle; gall; nag at
Emotional or psychological pain that lingers; often used for regrets, grudges, or hurt feelings that keep bothering someone.
彼の言葉が今でも心にうずいている。
His words still rankle in my heart.
後悔の念がうずいて仕方がない。
A feeling of regret keeps nagging at me.