necessary

1 forcing one's compliance or participation by or as if by law an emissions test is necessary before you can renew the registration for your car Synonyms of necessary compulsory, forced, imperative, incumbent, involuntary, mandatory, nonelective, obligatory, peremptory, requiredWords Related to necessary all-important, essential, indispensable, needed, requisite; insistent, persistent, pressing, urgent; demanded, enforced; coerciveNear Antonyms of necessary chosen, discretionary; dispensable, unnecessary, unneeded, unwanted; inconsequential, insignificant, nonessential, unimportantAntonyms of necessary elective, optional, voluntary

2 impossible to avoid or evade taxes will always be a necessary evil Synonyms of necessary certain, ineluctable, ineludible, inescapable, inevitable, sure, unavoidable, unescapableWords Related to necessary decided, definite, settled; likely, possible, probable; destined, fated, foreordained, predestined, predetermined, preordained; inexorable, relentless, unremitting, unstoppableNear Antonyms of necessary preventable (also preventible); doubtful, dubious, questionable, shaky, unclear; undecided, unsettled; undependable, unreliable; improbable, unlikelyAntonyms of necessary avoidable, evadable, uncertain, unsure

3 impossible to do without food and water are necessary for survival Synonyms of necessary all-important, critical, imperative, indispensable, integral, must-have, essential, necessitous, needed, needful, required, requisite, vitalWords Related to necessary prerequisite; compulsory, mandatory, nonelective, obligatory; consequential, crucial, important, major, material, meaningful, momentous, significant, substantial, weighty; basic, central, fundamental, key, organic; insistent, persistent, pressing, urgentNear Antonyms of necessary undesired, unwanted; inconsequential, insignificant, unimportant; excess, external, extra, extraneous, superfluous, surplusAntonyms of necessary dispensable, inessential, needless, nonessential, unessential, unnecessary, unneeded

something necessary, indispensable, or unavoidable a modest income that provided the family with only the necessaries of life Synonyms of necessary condition, demand, must, must-have, essential, necessity, need, needful, requirement, requisite, sine qua nonWords Related to necessary precondition, prerequisite; advantage, edge, plus; desideration, desideratum, wishNear Antonyms of necessary amenity, comfort, extra, extravagance, frill, indulgence, luxury, superfluity, surplus, surplusageAntonyms of necessary nonessential, nonnecessity