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self-admonition
同じ失敗を繰り返さないよう自戒した。
I admonished myself not to repeat the same mistake.
自戒の念を込めて日記を書いた。
I wrote a diary entry filled with self-admonition.
常に自戒を忘れない姿勢が大切だ。
It's important to always maintain self-discipline.