needs must

Obligation compels action

Needs must is a British expression acknowledging that circumstances sometimes force action regardless of preference: Needs must—I'll take the night shift if no one else can.

The full form is "needs must when the devil drives," meaning necessity compels even unpleasant choices.

The phrase sounds old-fashioned but remains current in British English.

Related

bare necessities · essential · come what may · inevitability · flexibility · resourcefulness · make do · resilience · roll with the punches · grin and bear it · tough it out · demand · bite the bullet · adaptation · improvisation · resignation · obligation · no choice but

Opposites
abundance vs. scarcity of options

needs mustspoiled for choice

Having too many options

at liberty · free to choose · carte blanche · free rein · anything goes

Family

need, needs, needed, needing, needy, needful, needless, needlessly, must

Familiarity
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Profile
Timeless · Abstract · Everyday, not technical · Rated G