decisive Synonyms

positive conclusive decided critical incontrovertible resultful serious set significant sound strategic strong-minded sure true-hearted ultimate unanswerable resolved resolute rememberable indisputable inerratic institutive irrefragable irrefrangible irrefutable irrevocable litmus major momentous overriding peremptory pivotal purposeful unappealable unconditional bent on dead set prima unwavering life-and-death life-or-death nonintersecting strong-willed matchwinning proactive self-appointed supercritical unarguable evaluative climactic