First class and Ineffective

Opposite meaning terms

First class noun - Mail that includes letters and postcards and packages sealed against inspection.

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Ineffective is an antonym for first class in eminent topic.

Ineffective adjective - Not producing the desired result.

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First class is an antonym for ineffective.

Cite this Source

Ineffective and First class. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/first_class/ineffective

First class & Ineffective. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/first_class/ineffective>.

Ineffective or First class. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/first_class/ineffective.

Google Ngram Viewer shows how "first class" and "ineffective" have occurred on timeline