英和和英

to be necessary

according to the need

do the necessary

of something, to be needed

by necessity

as requested

in case of necessity

a necessary thing

to meet a need―meet a want

to meet a need

Is required

the degree of necessity

as much as necessary

have need of

in any way necessary

necessity

to be pressed by necessity

It's necessary.

depending on the necessity

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

in great necessity

position or line of employment

according to the need―according to the urgency of the case

an exigency

to suit the exigency

absolutely necessary

more than is needed

the degree of indispensability

when the need arises

urgently needed