苛立ち

1. Origins, structure, and basic meaning

• Structure: 苛立ち is read as いらだち and is a noun for impatience or irritation caused by delay or frustration.
• Basic usage: Irritation showing in a voice appears in 声に苛立ちが混じる, while the feeling growing appears in 募る苛立ち.

2. Common pitfalls and similar expressions

• Impatience and irritation
  • It can combine impatience about waiting with the unpleasant irritation of a situation not improving.
• Difference from 怒り
  • Compared with strong anger directed at a clear target, this word focuses on accumulating frustration and impatience.