calamity

1. Origins, structure, and basic meaning

• Structure: 禍 has 13 strokes and concerns calamity or harm.
• Basic usage: 災禍 is read さいか, and 禍根 is read かこん.

2. Common pitfalls and similar expressions

• Calamity and its source
  • 過去の災禍 means past disasters or the damage they caused.
  • 将来の禍根になりかねない means could become a source of future trouble. It expresses the possibility of a bad outcome.
  • 災禍 names calamity or damage, while 禍根 names a source of trouble.