Quadruple VS
Synonym Boundary: "開けます", "開く", "空く", "散開星団"
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
Quadruple VS Nuance Contrast & Social Differences
When expressing "open" in Japanese, you must carefully distinguish between "開けます", "開く", "空く", "散開星団" 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..
Context for "開けます"
窓を開けます。
I open the window.
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.
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.".