Antonyms of verb necessitate

1 of 2 senses of necessitate

Sense 1
necessitate, ask, postulate, need, require, take, involve, call for, demand -- (require as useful, just, or proper; "It takes nerve to do what she did"; "success usually requires hard work"; "This job asks a lot of patience and skill"; "This position demands a lot of personal sacrifice"; "This dinner calls for a spectacular dessert"; "This intervention does not postulate a patient's consent")
       Antonym of obviate (Sense 1)
      => obviate, rid of, eliminate -- (do away with)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb necessitate

2 senses of necessitate

Sense 1
necessitate, ask, postulate, need, require, take, involve, call for, demand -- (require as useful, just, or proper; "It takes nerve to do what she did"; "success usually requires hard work"; "This job asks a lot of patience and skill"; "This position demands a lot of personal sacrifice"; "This dinner calls for a spectacular dessert"; "This intervention does not postulate a patient's consent")

Sense 2
necessitate -- (cause to be a concomitant)
       => lead -- (tend to or result in; "This remark lead to further arguments among the guests")

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