SURD Synonyms: 127 Similar and Opposite Words

surd

adjective

Definition of surd

as in irrational

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Example Sentences

Recent Examples of Synonyms for surd

Adjective

The more adult take is that these votes are not so much an irrational tantrum as a warning that a significant portion of Illinois feels increasingly alienated from its own government.

— The Editorial Board, Chicago Tribune, 10 Nov. 2026
Because the entire system is rewarded by doing more, investments in prevention are financially irrational.

— Paul Markovich, STAT, 2 Nov. 2026

Definition of irrational

Adjective

Call that illogical or crazy, but don’t call it preposterous, monstrous, wackadoo, or loony tunes.

— Chris John Amorosino, Hartford Courant, 3 Nov. 2026
But that’s illogical, given the enormous ratings for the Seahawks–Patriots game, which was shown on the NBC broadcast network and the Peacock streaming service.

— Brian Stelter, CNN Money, 15 Sep. 2026

Definition of illogical

Adjective

But in each event—in the living act, the undoubted deed—there, some unknown but still reasoning thing puts forth the mouldings of its features from behind the unreasoning mask.

— Literary Hub, Literary Hub, 6 July 2026
Roosevelt surely understood that nameless, unreasoning, unjustified fear cannot be eradicated.

— New York Times, New York Times, 9 June 2026

Definition of unreasoning

Adjective

With 20th Television increasingly focused on supplying Disney platforms, integrating the two areas would not be unreasonable.

— Nellie Andreeva, Deadline, 5 Nov. 2026
Frimpong concluded that plaintiffs were likely to prove the practice violated the 4th Amendment’s protection against unreasonable seizures and the 5th Amendment’s guarantee of equal protection.

— Brittny Mejia, Los Angeles Times, 29 Oct. 2026

Definition of unreasonable

Adjective

There’s a level of seriousness that belies the 90-minute comedy film he’s made, which features an imbecilic white rapper who speaks in Caribbean-British slang and a contraption that shoots bullets out of one’s rear end.

— Lacey Rose, HollywoodReporter, 21 Oct. 2026
Prep school was one such imbecile society.

— Jessica Winter, New Yorker, 7 May 2026

Definition of imbecile

Adjective

Or maybe he was lured into his thoughtless comments because of the jocularity inside that room full of reporters.

— Candace Buckner, New York Times, 16 Sep. 2026
At the outset of this chatty novel, the protagonist, Caroline, who was recently ghosted by a thoughtless man, has had a story published in this magazine.

— The New Yorker, New Yorker, 10 Aug. 2026

Definition of thoughtless

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surcoats

surd

sure

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“Surd.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/surd. Accessed 14 Nov. 2026.

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Synonyms of surd

adjective

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