戒め

1. Origins, structure, and basic meaning

• Structure: Spelling: 戒め. Reading: いましめ. Core meaning: lesson; warning.
• Basic usage: Representative examples: 同じ失敗を繰り返さないよう、この経験を戒めとした / 父の戒めを守り、暗くなる前に山を下りた.

2. Common pitfalls and similar expressions

• Lesson from experience and personal warning
  • It can be a lesson drawn from experience or an admonition given by another person. The former is insight taken for the future; the latter is a warning or instruction to heed.