Quadruple VS
Synonym Boundary: "開けます", "開通する", "散開星団", "公開市場操作"
All represent the core concept "open", but require precise selection.
Japanese Option A
開けます
あけます (akemasu)
N5 / CEFR
Japanese Option B
開通する
かいつうする (kaitsū suru)
N3 / CEFR
Japanese Option C
散開星団
さんかいせいだん (sankaiseidan)
C2 / CEFR
Japanese Option D
公開市場操作
こうかいしじょうそうさ (koukaishijousousa)
C2 / CEFR
Quadruple VS Nuance Contrast & Social Differences
When expressing "open" in Japanese, you must carefully distinguish between "開けます", "開通する", "散開星団", "公開市場操作" based on context.
- 開けます (あけます (akemasu) - Level: N5): Maps to "to open" and is used when Transitive verb. Used for opening doors, windows, books, shops, eyes, etc. The object is marked with を..
- 開通する (かいつうする (kaitsū suru) - Level: N3): Maps to "to open (for traffic), to be completed (e.g., a tunnel, bridge, line)" and is used when Used for infrastructure like roads, railways, tunnels, or new services becoming available for public use. It's an intransitive verb..
- 散開星団 (さんかいせいだん (sankaiseidan) - Level: C2): Maps to "Open cluster" and is used when Essential structural term in CEFR C2 vocabulary syllabus..
- 公開市場操作 (こうかいしじょうそうさ (koukaishijousousa) - Level: C2): Maps to "Open Market Operations" and is used when Essential structural term in CEFR C2 vocabulary syllabus..
Context for "開けます"
窓を開けます。
I open the window.
Context for "開通する"
新しい高速道路が来月開通する予定だ。
The new highway is scheduled to open next month.
Context for "散開星団"
私は散開星団に興味があります。
I am interested in Open cluster.
Context for "公開市場操作"
私は公開市場操作に興味があります。
I am interested in Open Market Operations.
Synonym Mastery Challenge
Which Japanese word perfectly fits this blank space?
Fill in the blank: "窓を ＿＿＿ 。" (Meaning: "I open the window.")
🎉 Correct Answer!
Remember: "開けます" is correct here because it represents "to open" in the context: "I open the window.".