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How to say "Radical" in Japanese

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

Japanese Option A

ラジカル重合

ラジカルじゅうごう (rajikarujuugou)
C2 / CEFR Syllabus
VS
Japanese Option B

根源悪

こんげんあく (kongennaku)
C2 / CEFR Syllabus

Nuance Contrast & Translation Difference

When translating "radical" into Japanese, you must choose carefully between ラジカル重合 and 根源悪. In Japanese, ラジカル重合 (ラジカルじゅうごう (rajikarujuugou)) is typically associated with "radical polymerization" (Syllabus Level: C2) and represents Essential structural term in CEFR C2 vocabulary syllabus.. On the other hand, 根源悪 (こんげんあく (kongennaku)) maps to "radical evil" (Syllabus Level: C2) and represents Essential structural term in CEFR C2 vocabulary syllabus.. A literal translation of "radical" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "ラジカル重合"
私はラジカル重合に興味があります。
I am interested in radical polymerization.
Bilingual Context for "根源悪"
私は根源悪に興味があります。
I am interested in radical evil.

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 radical polymerization.")
🎉 Correct Answer!

Remember: "ラジカル重合" fits here because it means "radical polymerization" in the context of: "I am interested in radical polymerization.". "根源悪" represents "radical evil".

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