necessary

nouns

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

adjectives

absolutely essential

necessary

is derived from

necessity

is derived from

necessity

antonym

unnecessary

is similar to

absolutely necessary; vitally necessary

"essential tools and materials"; "funds essential to the completion of the project"; "an indispensable worker"

essential, indispensable

is similar to

necessary (for someone) as a duty or responsibility; morally binding

"it is incumbent on them to pay their own debts"

incumbent

is similar to

necessary for relief or supply

"provided them with all things needful"

needed, needful, required, requisite

is similar to

required by obligation or compulsion or convention

"he made all the obligatory apologies"

obligatory

see also

not to be dispensed with; essential

"foods indispensable to good nutrition"

indispensable

is an attribute of

the condition of being essential or indispensable

necessity

unavoidably determined by prior circumstances

"the necessary consequences of one's actions"

necessary

is similar to

incapable of being avoided or prevented

"the inevitable result"

inevitable