1. Na-adjective (keiyodoshi), Noun

   1.

   useless; futile

2. 2.

   unnecessary; needless

3. 3.

   not on business; unrelated; unauthorised; unauthorized

Example sentences

• 心配ご無用。楽勝です。

  Don't worry. It's a piece of cake.

• 問答無用！さっさとやれ！

  There is no use arguing! Do it quickly!