英和和英

have need of

to cause necessity―necessitate

a necessary or essential thing

to be pressed by necessity

necessitate or exact

the degree of indispensability

to be necessary

depending on the necessity

to meet a need

to meet a need―meet a want

of something, to be needed

absolutely essential

It's necessary.

according to the need

be surplus to requirements

the state of being unnecessary

the degree of necessity

in case of necessity

something that is indispensable

necessity of matter (be unnecessary)

demand for a product or service

not necessary

of necessity―needs―perforce

something desired as a necessity

action having to do with progress of action or matter (do more than is necessary)

by necessity

necessity

anything that is necessary but lacking

an instant need

a thing which must be done