息苦しい

1. Origins, structure, and basic meaning

• Structure: 息苦しい (いきぐるしい) is an inflecting adjective for physical difficulty breathing or a figuratively oppressive atmosphere.
• Basic usage: 部屋が息苦しい describes physical stuffiness in a crowded room, while 生活を息苦しく感じる uses the adverbial form for feeling constrained by detailed rules.

2. Common pitfalls and similar expressions

• Breathing discomfort and oppression
  • 息苦しいと感じる concerns physical air or breathing discomfort, whereas 息苦しく感じる figuratively evaluates a way of life as constraining. The latter does not establish a respiratory symptom.