Quadruple VS
Synonym Boundary: "いち", "一つ", "逐一", "一因"
All represent the core concept "one", but require precise selection.
Japanese Option A
いち
いち (ichi)
N5 / CEFR
Japanese Option B
一つ
ひとつ (hitotsu)
N5 / CEFR
Japanese Option C
逐一
ちくいち (chikuichi)
N2 / CEFR
Japanese Option D
一因
いちいん (ichiin)
N2 / CEFR
Quadruple VS Nuance Contrast & Social Differences
When expressing "one" in Japanese, you must carefully distinguish between "いち", "一つ", "逐一", "一因" based on context.
- いち (いち (ichi) - Level: N5): Maps to "one" and is used when Basic number for counting. Can be used as a standalone number or with various counters.
- 一つ (ひとつ (hitotsu) - Level: N5): Maps to "one (general counter for objects)" and is used when Used for counting general items, especially small, individual objects, when a specific counter is not needed or known..
- 逐一 (ちくいち (chikuichi) - Level: N2): Maps to "one by one, in detail, item by item" and is used when To do or report things individually, sequentially, and in full detail. It emphasizes meticulousness and thoroughness. Often used with verbs like 報告する.
- 一因 (いちいん (ichiin) - Level: N2): Maps to "one cause; a contributing factor" and is used when Used to indicate one of several causes or factors contributing to a situation, often a negative one..
Context for "いち"
りんごが一つあります。
There is one apple.
Context for "一つ"
りんごを一つください。
Please give me one apple.
Context for "逐一"
彼は出張の進捗状況を逐一報告してくれた。
He reported the progress of his business trip in detail, item by item.
Context for "一因"
彼の失敗は準備不足が一因だ。
His failure was partly due to insufficient preparation.
Synonym Mastery Challenge
Which Japanese word perfectly fits this blank space?
Fill in the blank: "りんごが一つあります。" (Meaning: "There is one apple.")
🎉 Correct Answer!
Remember: "いち" is correct here because it represents "one" in the context: "There is one apple.".