What does ても＋いかん do?


> 今闘技場にいる観衆は外に出すな、モンスターが脱走したことを悟られ **てもいかん** ！

What meaning does いかん have in this sentence? I've never seen this before.




いかん is short for いけない.

> Don't let the audiences in the arena go outside. It is not good if they
> notice the monsters have escaped.




いかん is short for いけない.

> Don't let the audiences in the arena go outside. It is not good if they
> notice the monsters have escaped.

