Quintuple VS
Synonym Boundary: "開ける", "開く", "空く", "散開星団", "公開市場操作"
All represent the core concept "open", but require precise selection.
Japanese Option A
開ける
あける (akeru)
N5 / CEFR
Japanese Option B
開く
あく (aku)
N4 / CEFR
Japanese Option C
空く
あく (aku)
N4 / CEFR
Japanese Option D
散開星団
さんかいせいだん (sankaiseidan)
C2 / CEFR
Japanese Option E
公開市場操作
こうかいしじょうそうさ (koukaishijousousa)
C2 / CEFR
Quintuple VS Nuance Contrast & Social Differences
When expressing "open" in Japanese, you must carefully distinguish between "開ける", "開く", "空く", "散開星団", "公開市場操作" based on context.
- 開ける (あける (akeru) - Level: N5): Maps to "to open (something)" and is used when Transitive verb.
- 開く (あく (aku) - Level: N4): Maps to "to open (intransitive)" and is used when Intransitive verb. Used when something opens on its own or is opened by an unspecified agent.
- 空く (あく (aku) - Level: N4): Maps to "to open, to be vacant, to be available, to become empty" and is used when An intransitive verb. Refers to something becoming empty, available, or a space opening up. For example, 席が空く.
- 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 "開ける"
ドアを開けてください。
Please open the door.
Context for "開く"
ドアが自動的に開きます。
The door opens automatically.
Context for "空く"
会議室が空いていますか。
Is the meeting room available?
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: "ドアを開けてください。" (Meaning: "Please open the door.")
🎉 Correct Answer!
Remember: "開ける" is correct here because it represents "to open (something)" in the context: "Please open the door.".