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Synonym Nuance VS

How to say "Uncertain" in Japanese

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

Japanese Option A

不確か

ふたしか (futashika)
N3 / CEFR Syllabus
VS
Japanese Option B

おぼつかない

おぼつかない (obotsukanai)
N2 / CEFR Syllabus

Nuance Contrast & Translation Difference

When translating "uncertain" into Japanese, you must choose carefully between 不確か and おぼつかない. In Japanese, 不確か (ふたしか (futashika)) is typically associated with "uncertain, unreliable" (Syllabus Level: N3) and represents Describes information, facts, or situations that are not definite or reliable. Can be used predicatively. On the other hand, おぼつかない (おぼつかない (obotsukanai)) maps to "uncertain, unreliable, shaky, unsteady, doubtful, precarious" (Syllabus Level: N2) and represents Describes a state of being unstable, unsteady, or unreliable, often with a sense of anxiety or doubt about the outcome. Can refer to physical balance, a future prospect, or someone's ability.. A literal translation of "uncertain" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "不確か"
彼の話は根拠が不確かだ。
The basis of his story is uncertain.
Bilingual Context for "おぼつかない"
老いた祖父は、足元がおぼつかない様子で歩いていた。
My elderly grandfather walked with unsteady steps.

Nuance Mastery Quiz

Which Japanese word perfectly fits this blank space?

Fill in the blank: "彼の話は根拠が ___ だ。" (Meaning: "The basis of his story is uncertain.")
🎉 Correct Answer!

Remember: "不確か" fits here because it means "uncertain, unreliable" in the context of: "The basis of his story is uncertain.". "おぼつかない" represents "uncertain, unreliable, shaky, unsteady, doubtful, precarious".

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