無断
Meanings
without permission; unauthorized
Used when an action is taken without obtaining consent. Common in compounds like 無断使用 (unauthorized use) and 無断転載 (unauthorized reproduction).
If you park without permission, you will be fined.
Unauthorized reproduction of this material is prohibited.
without notice; without prior warning
Used when something is done without giving advance notice. Often seen in phrases like 無断欠勤 (absence without notice) and 無断キャンセル (cancellation without notice).
He was absent from work without notice.
Please refrain from canceling without prior notice.
Usage patterns
- 〈物〉を無断で使用するto use something without authorization
You must not use someone else's photo without permission.
- 無断で休むto take time off without notice
He took the day off from work without telling anyone.
- 〈場所〉に無断で立ち入るto enter a place without permission
It's dangerous to enter a construction site without permission.
- 無断で外出するto go out without telling anyone
The family worried because the child went out without telling anyone.
Expressions
- 無断でwithout permission; without notice