inessential Antonyms

essential intended pertinent plasmic precondition prerequisite pressing primal primary principal required requirement requisite parlous organic obligatory intrinsic key main mainstay major mandatary mandatory must necessary necessity needed needful staple structural substantive climactic biogenic life-and-death life-or-death lifesaving mandatorily Guatemala City no-frills hot potato semantic symbiotic unsatisfiable Kabul meat and potatoes bare bones tectonic telling urgent virtual