What is to you unforgivable?

A number of things. Honestly, it depends on the variables. For example, if the person knew exactly what they were doing, and it was wrong, that can affect things.

To make someone take their own life.

Ending someone's life. >:)

Nearly any action is forgivable - even if not every action necessarily SHOULD be forgiven - as long as the person who did the thing is willing to change.

To gave my reward to someone else:((

I do not know

Nothing :)