own foolishness
definitions
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The state or quality of being unwise, lacking good judgment, or acting irrationally, specifically attributed to oneself.ja: 自らの愚かさ
examples
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He realized that his current predicament was a direct result of his own foolishness.
彼は現在の苦境が自分自身の愚かさの直接的な結果であることに気づいた。