decisive

This word carries a strong sense of finality and strength. When applied to a person, it suggests a confidence that borders on the absolute, removing the paralysis of doubt or the need for further deliberation. It is almost always positive, implying efficiency and leadership rather than impulsiveness. When applied to an event or a moment, it describes a tipping point. It is the specific action that breaks a deadlock or ends a conflict, shifting the state of affairs from uncertainty to a permanent conclusion.