necessity, essential, requirement, requisite, necessary -- (anything indispensable; "food and shelter are necessities of life"; "the essentials of the good life"; "allow farmers to buy their requirements under favorable conditions"; "a place where the requisites of water fuel and fodder can be obtained")
Overview of adj necessary
The adj necessary has 2 senses
necessary -- (absolutely essential)
necessary -- (unavoidably determined by prior circumstances; "the necessary consequences of one's actions")
(Sound)
