nonessential Antonyms

required necessary essential integral plasmic precondition pressing all important principal requirement obligatory needful needed intrinsic key main major mandatary mandatory must need requisite significant spanner climactic life-or-death lifesaving mandatorily Guatemala City nonelective symbiotic unsatisfiable hassle karat Kabul structural urgent vital asymptotic axiological amoebic casting vote Bangui very important acute clamant clamorous climatic compelling compulsatory