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How to say "Foolish" in Japanese

Both words can translate to "foolish", but which should you choose?

Japanese Option A

愚策

ぐさく (gusaku)
N2 / CEFR Syllabus
VS
Japanese Option B

尾生之信

びせいのしん (biseinoshin)
C2 / CEFR Syllabus

Nuance Contrast & Translation Difference

When translating "foolish" into Japanese, you must choose carefully between 愚策 and 尾生之信. In Japanese, 愚策 (ぐさく (gusaku)) is typically associated with "foolish plan, stupid policy, ill-conceived strategy" (Syllabus Level: N2) and represents A plan or policy that is poorly thought out, ineffective, or likely to lead to negative consequences. Used critically to describe a bad strategy.. On the other hand, 尾生之信 (びせいのしん (biseinoshin)) maps to "Foolish, obstinate faithfulness" (Syllabus Level: C2) and represents Essential structural term in CEFR C2 vocabulary syllabus.. A literal translation of "foolish" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "愚策"
その政策は愚策だと批判された。
That policy was criticized as a foolish plan.
Bilingual Context for "尾生之信"
私は尾生之信に興味があります。
I am interested in Foolish, obstinate faithfulness.

Nuance Mastery Quiz

Which Japanese word perfectly fits this blank space?

Fill in the blank: "その政策は ___ だと批判された。" (Meaning: "That policy was criticized as a foolish plan.")
🎉 Correct Answer!

Remember: "愚策" fits here because it means "foolish plan, stupid policy, ill-conceived strategy" in the context of: "That policy was criticized as a foolish plan.". "尾生之信" represents "Foolish, obstinate faithfulness".

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