why is suicide so frowned upon?

It's frowned on because to some it is seen as selfish because of the people left behind (family, friends etc) and also that some people are so ill they would do anything to live and have more time so they consider people who choose to die as selfish.

Suicide is frowned up on because life is a special gift. You ahoukd cherish it and look after it. Its against gods will....and human law.

Then theirs the people (your friends & family) you leave behind causing them all that greif and heartache! Its an easy way out of dealing with problems that have got to much.

Death, in many ways, seems much more appealing than life.

Suicide should be an option for anyone, and it is. If you don't want to be here, so be it. Maybe there's something better awaiting :), but maybe not :(.

I get excited about the possibilities of new life after death.

Suicide is frowned upon because its a permanent solution to a temporary problem

Because nobody has the right to take a life. Especially their own. No matter how serious a problem is it will get better so why kill yourself. It's not cowardly but it is selfish.

Suicide is frowned upon because it is against the law of God and of man.

Because it hurts so many people. And its against the principles to take your own life. It is not ours to take. We didn't give life, So we cannot take it.