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How to say "One" in Japanese

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

Japanese Option A

相次いで

あいついで (aitsuide)
N2 / CEFR Syllabus
VS
Japanese Option B

一気に

いっきに (ikkini)
B2 / CEFR Syllabus

Nuance Contrast & Translation Difference

When translating "one" into Japanese, you must choose carefully between 相次いで and 一気に. In Japanese, 相次いで (あいついで (aitsuide)) is typically associated with "one after another; in succession" (Syllabus Level: N2) and represents Describes multiple events or incidents happening consecutively. Often used for significant or repeated occurrences.. On the other hand, 一気に (いっきに (ikkini)) maps to "in one go" (Syllabus Level: B2) and represents Essential structural term in CEFR B2 vocabulary syllabus.. A literal translation of "one" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "相次いで"
事故が相次いで発生した。
Accidents occurred one after another.
Bilingual Context for "一気に"
私は一気にに興味があります。
I am interested in in one go.

Nuance Mastery Quiz

Which Japanese word perfectly fits this blank space?

Fill in the blank: "事故が ___ 発生した。" (Meaning: "Accidents occurred one after another.")
🎉 Correct Answer!

Remember: "相次いで" fits here because it means "one after another; in succession" in the context of: "Accidents occurred one after another.". "一気に" represents "in one go".

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