いけない

Etymology
Negative form of, the potential form of.

Adjective

 * 1) bad, naughty
 * 2)  it's bad if...
 * 1)  it's bad if...
 * 1)  it's bad if...
 * 1)  it's bad if...

Usage notes
The “it's bad if …” sense is similar to or, but appeals to morals instead of rules. is used for something you're not allowed to do, and is used for something that you shouldn't do because it brings about an unwanted result. However, this doesn't mean that (e.g. in ) makes it a request instead of a demand.

Interjection

 * 1) Oh no!