無念

1. Origins, structure, and basic meaning

• Structure: The noun and adjectival noun 無念 (むねん) denotes deep regret or chagrin at an unrealized aim.
• Basic usage: It modifies a feeling in 無念な気持ち, while visible appearance is described as 無念そうだ.

2. Common pitfalls and similar expressions

• Regret over an unfulfilled aim
  • It is stronger than minor everyday regret and arises from a thwarted purpose.