Quintuple VS
Synonym Boundary: "開ける", "開く", "空く", "開通する", "散開星団"
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
開通する
かいつうする (kaitsū suru)
N3 / CEFR
Japanese Option E
散開星団
さんかいせいだん (sankaiseidan)
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", "開通する", "散開星団" 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.
- 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..
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 "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.
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.".