noun, noun, used as a prefix
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).
無断で駐車すると罰金を取られます。
If you park without permission, you will be fined.
この資
Unauthorized reproduction of this material is prohibited.
noun, noun, used as a prefix
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).
彼は無断で欠勤した。
He was absent from work without notice.
無断キャンセルはご遠慮ください。
Please refrain from canceling without prior notice.