Pivotal

//ˈpɪvɪtəl// adj

Definitions

Adjective
  1. 1
    Of, relating to, or being a pivot.
  2. 2
    Being of crucial importance; central, key.

    "It is time the international community faced the reality: we have an unmanageable, unfair, distortionary global tax regime. It is a tax system that is pivotal in creating the increasing inequality that marks most advanced countries today […]."

Adjective
  1. 1
    being of crucial importance wordnet

Etymology

From pivot + -al.

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