英和和英

to be necessary

do the necessary

of something, to be needed

according to the need

by necessity

to be pressed by necessity

to meet the need―fill a need―minister to one's needs

have need of

a necessary thing

It's necessary.

necessity

Is required

to meet a need

to meet a need―meet a want

something that is indispensable

to suit the exigency

position or line of employment

to supply the demand―meet the demand

to provide the necessities

urgently needed

in case of necessity

meet a need

the degree of necessity

to cause necessity―necessitate

to be provided with necessities

to urge （on one） the necessity of something―impress upon one the importance of something

absolutely necessary

the matter which must be addressed

more than is needed

not necessary