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How to say "Fundamental" in Japanese

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

Japanese Option A

基本群

きほんぐん (kihongun)
C2 / CEFR Syllabus
VS
Japanese Option B

厚生経済学の基本定理

こうせいけいざいがくのきほんていり (kouseikeizaigakunokihonnteiri)
C2 / CEFR Syllabus

Nuance Contrast & Translation Difference

When translating "fundamental" into Japanese, you must choose carefully between 基本群 and 厚生経済学の基本定理. In Japanese, 基本群 (きほんぐん (kihongun)) is typically associated with "fundamental group" (Syllabus Level: C2) and represents Essential structural term in CEFR C2 vocabulary syllabus.. On the other hand, 厚生経済学の基本定理 (こうせいけいざいがくのきほんていり (kouseikeizaigakunokihonnteiri)) maps to "Fundamental Theorems of Welfare Economics" (Syllabus Level: C2) and represents Essential structural term in CEFR C2 vocabulary syllabus.. A literal translation of "fundamental" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "基本群"
私は基本群に興味があります。
I am interested in fundamental group.
Bilingual Context for "厚生経済学の基本定理"
私は厚生経済学の基本定理に興味があります。
I am interested in Fundamental Theorems of Welfare Economics.

Nuance Mastery Quiz

Which Japanese word perfectly fits this blank space?

Fill in the blank: "私は ___ に興味があります。" (Meaning: "I am interested in fundamental group.")
🎉 Correct Answer!

Remember: "基本群" fits here because it means "fundamental group" in the context of: "I am interested in fundamental group.". "厚生経済学の基本定理" represents "Fundamental Theorems of Welfare Economics".

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