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How to say "Deep" in Japanese

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

Japanese Option A

思案投げ首

しあん投げ首 (shian-nagekubi)
N2 / CEFR Syllabus
VS
Japanese Option B

幽邃

ゆうすい (yuusui)
C2 / CEFR Syllabus

Nuance Contrast & Translation Difference

When translating "deep" into Japanese, you must choose carefully between 思案投げ首 and 幽邃. In Japanese, 思案投げ首 (しあん投げ首 (shian-nagekubi)) is typically associated with "deep in thought with a bowed head, pondering deeply, in a quandary" (Syllabus Level: N2) and represents An idiom describing a state of deep contemplation, often accompanied by a dejected or puzzled expression, with one's head bowed. Implies struggling to find a solution to a difficult problem. 難しい問題について深く考え込み、頭を垂れて困惑している様子を表す慣用句です。解決策が見つからずに悩んでいる状態を指します。. On the other hand, 幽邃 (ゆうすい (yuusui)) maps to "deep and secluded / profound" (Syllabus Level: C2) and represents Essential structural term in CEFR C2 vocabulary syllabus.. A literal translation of "deep" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "思案投げ首"
彼は難しい問題に直面し、思案投げ首の様子で座っていた。
Facing a difficult problem, he sat there, deep in thought with a bowed head.
Bilingual Context for "幽邃"
私は幽邃に興味があります。
I am interested in deep and secluded / profound.

Nuance Mastery Quiz

Which Japanese word perfectly fits this blank space?

Fill in the blank: "彼は難しい問題に直面し、 ___ の様子で座っていた。" (Meaning: "Facing a difficult problem, he sat there, deep in thought with a bowed head.")
🎉 Correct Answer!

Remember: "思案投げ首" fits here because it means "deep in thought with a bowed head, pondering deeply, in a quandary" in the context of: "Facing a difficult problem, he sat there, deep in thought with a bowed head.". "幽邃" represents "deep and secluded / profound".

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