English

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Etymology

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un- +‎ effective

Adjective

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uneffective (comparative more uneffective, superlative most uneffective)

  1. Synonym of ineffective
    • 1942, Foreign Relations of the United States, United States: Department of State, page 419:
      The usual formal protest which I am making will be uneffective unless the Legation is prepared to take other measures such as the releasing of seized cargoes by our Navy.