as in childish
having or showing the annoying qualities (as silliness) associated with children
the infantile humor that teenage boys are justly famous for
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Recent Examples of infantile
The incredibly painful, totally infantile, Banana Republic government shutdown ends.
—
Jim Cramer, CNBC, 10 Nov. 2025
The infantile form of Tay-Sachs manifests between three and six months of age, undermining gross motor control, worsening into seizures, deafness, and paralysis, and death by age five.
—New Atlas, 7 Nov. 2025
But they’re born with severe brain malformations, eye abnormalities and a debilitating form of epilepsy called infantile spasms.
—Erika Edwards, NBC news, 4 Oct. 2025
Muscle Man is a deeply ironic book, creating a vast chasm between Harold’s strongman self-image and his infantile powers of self-expression.
—Robert Rubsam, Vulture, 18 Sep. 2025
See All Example Sentences for infantile
Jim Cramer, CNBC, 10 Nov. 2025
The infantile form of Tay-Sachs manifests between three and six months of age, undermining gross motor control, worsening into seizures, deafness, and paralysis, and death by age five.
—New Atlas, 7 Nov. 2025
But they’re born with severe brain malformations, eye abnormalities and a debilitating form of epilepsy called infantile spasms.
—Erika Edwards, NBC news, 4 Oct. 2025
Muscle Man is a deeply ironic book, creating a vast chasm between Harold’s strongman self-image and his infantile powers of self-expression.
—Robert Rubsam, Vulture, 18 Sep. 2025
See All Example Sentences for infantile
Recent Examples of Synonyms for infantile
Adjective
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Those leaders who ignore or flout the law aren’t merely unethical but fatally arrogant, putting their childish willfulness over the wisdom of generations.—
David Brooks,
The Atlantic,
25 Mar. 2026
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However, this is a childish fantasy.—
Dr. Michael Good,
Hartford Courant,
25 Mar. 2026
Adjective
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Yet this widely available gourd—harvested and eaten while still immature, in fact, for ripe cucumbers are yellow and bitter—is not the entirety of the plant.—
Andrés Muedano,
JSTOR Daily,
25 Mar. 2026
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Preterm and low-birth-weight babies are at higher risk than full-term babies of developing NEC, potentially because of their immature digestive systems, according to the National Institutes of Health.—
Lisa Schencker,
Chicago Tribune,
10 Mar. 2026
Adjective
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Some of her adolescent outbursts and antics (that were so delicious to play).—
Stephen Schaefer,
Boston Herald,
29 Mar. 2026
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Any full-length conversation between Tua Tagovailoa and his adolescent self would, eventually, disclose details of the dark days.—
Daniel Flick - The Atlanta Journal-Constitution,
AJC.com,
25 Mar. 2026
Adjective
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Over a two-year period, researchers at the Shark Lab used drones to study more than two dozen beaches up and down the California coastline and found juvenile white sharks congregating at two spots in southern Santa Barbara County and central San Diego County.—
Clara Harter,
Los Angeles Times,
27 Mar. 2026
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The two offenders were sentenced to two years of probation and 60 hours of community service each − one hour for each victim, Judge Leonard Brown said − meaning they will not be put into a juvenile detention facility, while technically remaining under the supervision of the juvenile justice system.—
Alyssa Goldberg,
USA Today,
26 Mar. 2026
Cite this Entry
“Infantile.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infantile. Accessed 2 Apr. 2026.
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