Conclusive
Part of speech: adjective
Definition: Pertaining to a conclusion Providing an end to something; decisive.
Decisive
Part of speech: adjective
Definition: Having the power or quality of deciding a question or controversy; putting an end to contest or controversy; final; conclusive.Marked by promptness and decision.
Example sentence: When I take action, I'm not going to fire a $2 million missile at a $10 empty tent and hit a camel in the butt. It's going to be decisive.