essential

acute bare barest base basis basic binding born bottom line built-in burning cardinal central characteristics characteristic characteristic condition considerable constitutional constituent constituent cornerstone crucial elementary fundamental helpful high imperative important inborn inborn/inbred indigenous indispensable inherent innate inner inner intrinsic integral intimate littlest life-and-death main mandatory material meat and potatoes meaningful minimal minimalist more needed more helpful more inborn more inborn more meaningful more inbred more acute more requisite more crucial more primary more primary more urgent most inbred most minimal most fundamental most crucial most basic most needed most requisite most urgent most inborn most inborn more natural more required more required most primary most primary most required most required must-have native necessary necessity natural needed newsworthy need organic paradigmatic pivotal precondition prerequisite prerequisite prerequisites primary/prime primitive primary primest principal prototypic prototypical prototypal qualification radical realest real required requisites requisites requisite requirement/requisite requirement required/requisite rudimental rudiment sine qua non smallest staple states state substantive systemic typic typical underlying urgent virtual