知らない

Meaning

1. adj-i
   unknown; strange
2. int
   I don't care; that's irrelevant; whatever

Example sentences

• 知らない。

  I don't know.

• 知らないってどういうこと？！

  What do you mean you don't know?!

• あなた私が誰か知らないのね。

  You don't know who I am.