英和和英

when the need arises

in case of necessity

according to the need

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

to be necessary

by necessity

do the necessary

of something, to be needed

in any way necessary

as much as necessary

the degree of necessity

depending on the necessity

to meet a need―meet a want

to meet a need

immediate needs

at [in case of] need

to provide against a possible need―provide against emergencies

a necessary thing

in great necessity

something that can be relied on when needed

position or line of employment

if there happens to be need

absolutely necessary

to be pressed by necessity

urgently needed

the quality of being at hand when needed

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

to cause necessity―necessitate

the degree of indispensability

in one's hour of need