vital

acute alive alive animated animate basic bottom line brawny brawnier burning capital cardinal chief chiefest climactic constitutional constitutive critical crucial effervescent energetic essential fresher freshest full-blooded fresh fundamental gravest grave imperative important impressive indispensable key kinetic life-and-death live live living lusty main major material meat and potatoes momentous more impressive more crucial more critical more alive more alive more acute more requisite more pressing more needed more robust more necessary more primary more significant more required more required more urgent most basic most crucial most fundamental most needed most pressing most primary most requisite most robust most required most required most significant most urgent must-have necessary needed newsworthy on the ball organic peaches-and-cream pivotal prerequisite pressing primary radical required required/requisite robust significant sound strategic strenuous underlying urgent vigorous vibrant vivacious virile zippy