necessity

nouns

the condition of being essential or indispensable
necessity
is derived from
necessary
is derived from
necessitate
is a type of (narrower)
a condition requiring relief
"she satisfied his need for affection"; "God has no need of men to accomplish His work"; "there is a demand for jobs"
demand, need
is an attribute of
absolutely essential
necessary
is an attribute of
not necessary
unnecessary, unneeded
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"
essential, necessary, necessity, requirement, requisite
is derived from
necessitous
is derived from
necessary
is derived from
necessitate