insistent - definition and synonyms

adjective 

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/ɪnˈsɪstənt/
  1. 1
    saying very firmly that something must happen or that something is true
    insistent on:

    She was absolutely insistent on getting her money by tomorrow.

    insistent that:

    John was insistent that we shouldn’t tell anyone else about our plans.

  2. 2
    continuous, and loud or strong

    The insistent buzz of the telephone was driving me mad.

derived word

insistently

adverb