most required

appropriate called for compulsatory compulsory condign demanded deserved due enforced essential imperative imperious indispensable just mandatory needed needful obligatory prerequisite prescribed recommended right rightful set suitable unavoidable vital

nonessential optional unnecessary

appropriate compulsory enforced mandatory needed obligatory prescribed recommended requisite vital

demanded deserved right set

called for compulsatory condign due essential imperative imperious indispensable just needful prerequisite rightful suitable unavoidable

optional voluntary

inessential