ˌən-ˈrēz-nə-bəl
1
as in irrational
having no basis in reason or fact
an unreasonable assumption
Synonyms & Similar Words
Relevance
Antonyms & Near Antonyms
2
as in unreasoning
not using or following good reasoning
an unreasonable respect for a man who did not deserve it
Synonyms & Similar Words
Antonyms & Near Antonyms
Example Sentences
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 unreasonable
Why misunderstanding held reasonable The court acknowledged that the whistleblower law does not protect employee complaints based on nonexistent laws or based on an unreasonable interpretation of a particular law.
—
Dan Eaton, San Diego Union-Tribune, 29 Dec. 2025
The Fourth Amendment protects people from unreasonable searches and seizures by the government, and the 14th Amendment guarantees citizens equal protection of the laws and due process of law.
—Cathy Kozlowicz, jsonline.com, 29 Dec. 2025
Reactions were mixed over whether or not the OP was being unreasonable.
—Toria Sheffield, PEOPLE, 21 Dec. 2025
The memo notes several sustained violations of Austin Police Department general orders, including failure to de-escalate, unreasonable response to resistance, inaccurate and misleading report writing, dishonesty and acts bringing discredit upon the department.
—Dante Motley, Austin American Statesman, 18 Dec. 2025
See All Example Sentences for unreasonable
Recent Examples of Synonyms for unreasonable
Adjective
-
Cramer warned that these moments can feel chaotic — even irrational — but are often driven by valuation extremes finally snapping back toward equilibrium.—
-
Often, these unjustifiable fears arise simply because people draw irrational conclusions from rational concerns.—
Adjective
-
Let sound political prescience but take the place of an unreasoning prejudice, and this will be done.—
Adjective
-
However, videos taken by eyewitnesses have led many to decry the shooting as unwarranted.—
-
Democrats pushed back, specifically leaders in New Orleans who said a deployment was unwarranted.—
Adjective
-
Trump took decisive action Saturday in launching precision military strikes in Venezuela that enabled special forces to seize and detain Maduro, an illegitimate leader despised by his own people.—
-
Rubio insisted in interviews that Washington will use control of Venezuela’s oil industry to force policy changes, and called the government currently in place illegitimate.—
Adjective
-
The law was based on fears of espionage after the attack, which were generally unfounded.—
-
This homeowner's unfounded accusation that our office violated this obligation is untrue and personally offensive.—
Adjective
-
This perspective that America’s founders supported insurrectionism is baseless.—
-
Kyiv has dismissed the allegation as a baseless lie aimed at building a pretext for the Kremlin to push ahead with its war.—
Adjective
-
The collapse was likely the result of a leaking water line that washed out the soil underneath and left the pavement unsupported.—
-
Critics said the idea was unsupported and could mislead parents.—
Adjective
-
After an examination of her records, the election board said 188 of Walker Thomas’ petition signatures were invalid, which brought her total number of valid signatures to 445, below the minimum 500 signatures required to run.—
-
Noriega argued his charges were invalid under the legal doctrine that heads of state are often immune from prosecution, but courts rejected that argument in his case.—
Cite this Entry
“Unreasonable.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unreasonable. Accessed 12 Jan. 2026.
Love words? Need even more definitions?
Merriam-Webster unabridged
Share