狂気

1. Origins, structure, and basic meaning

• Structure: 狂気(きょうき) is a strong noun for a seemingly irrational state or extreme behavior.
• Basic usage: It describes an unsettling quality behind a smile or an extreme fixation on a goal.

2. Common pitfalls and similar expressions

• Evaluation compared with 情熱
  • 情熱というより狂気だった judges the behavior as closer to madness than passion. Unlike the positive commitment conveyed by 情熱(じょうねつ), 狂気 here strongly judges it as going too far.