brilliant achievement; spectacular feat
Used for a remarkable, praiseworthy accomplishment, often in sports, science, or public life. Carries a strong positive evaluation.
His winning the Nobel Prize is a brilliant achievement.
The team accomplished a spectacular feat.
He accomplished the spectacular feat of flying around the world without landing.
All of Japan was buzzing with excitement over the remarkable achievement.
This marked the first such feat in ten years.
The team achieved a world-first feat.
功績 emphasizes meritorious service or contribution recognized over time, while 快挙 focuses on the striking, praiseworthy nature of a single feat.
成果 is a neutral term for results or outcomes, whereas 快挙 is specifically a praiseworthy, remarkable deed.
Compound of 快 (pleasant, good) and 挙 (act, undertaking). The exact historical derivation is uncertain, but the kanji combination conventionally conveys a 'pleasing deed' or 'splendid act'.