駄目なの

is it not okay?

→ 駄目だ

phrase Rare #33,752

is it not okay? An informal conversational expression used to ask why something is not allowed or whether it is necessary. After a phrase like なきゃ, it can mean “do I have to...?”

JA: ここに座っちゃ駄目なの？

EN: Is it not okay to sit here?

この手紙、英語で書かなきゃ駄目なの？

Do I have to write this letter in English?

とにかく、駄目なものは駄目なの！

No matter what, no means no!

トムは今日家にいなきゃ駄目なの？

Does Tom have to stay home today?

今すぐ行かなきゃ駄目なの？

Do I really have to go right now?

なぜ駄目なの？

Why not?

— 荒野の用心棒 (1964)