UNREASONABLENESS Synonyms: 18 Similar and Opposite Words

unreasonableness

noun

as in irrationality

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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of unreasonableness If the assassination made the President a Christlike figure, his forbearance in the face of a wife’s unreasonableness provides him with an extra measure of purity. — Literary Hub, 21 May 2026

Recent Examples of Synonyms for unreasonableness

Noun

The irrationality ensures that no petal is directly above another.

— Manon Bischoff, Scientific American, 13 Oct. 2026
In other words, emotion, empathy and irrationality could be seen as some of the most powerful counterweights to AI.

— Billy J. Stratton, The Conversation, 21 Aug. 2026

Definition of irrationality

Noun

Gerrymandering, it was now said, was one of the factors that was driving polarization and extremism in general.

— J. B. MacKinnon, Harpers Magazine, 27 Oct. 2026
His main challenger, former military chief of staff Gadi Eisenkot, leads a center-right opposition promising more diplomacy and less extremism.

— Daniel Estrin, NPR, 25 Oct. 2026

Definition of extremism

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unreasonable

unreasonableness

unreasonably

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“Unreasonableness.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unreasonableness. Accessed 2 Nov. 2026.

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Synonyms of unreasonableness

noun

Example Sentences

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