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necessitate

verb [T]
 
 
/nəˈses.ɪ.teɪt/ formal

Definition

to cause something to be needed, or to make something necessary: Reduction in government spending will necessitate further cuts in public services. [+ -ing verb] An important meeting necessitates my being in London on Friday.Essential or necessary
(Definition of necessitate verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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