鬱うっ積せき

noun, noun or participle which takes 'suru', intransitive verb

accumulation; buildup; suppression

Refers to the piling up of negative emotions such as discontent, frustration, or anger, often with a sense of being held in or suppressed. Commonly used with する to describe the process of such feelings building up inside.

• 不ふ満まんが鬱うっ積せきして、ついに爆ばく発はつした。

  His discontent built up and finally exploded.

• 長なが年ねんの怒いかりが心こころの中なかに鬱うっ積せきしている。

  Years of anger have been accumulating in his heart.