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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Example Sentences
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Recent Examples of infantile
The program is the legacy of Dr. Stephen Arnon, chief of the Infant Botulism Treatment and Prevention Program at the California health department, who dedicated his life to finding a treatment for infantile botulism.
—
Brenda Goodman, CNN Money, 25 Nov. 2025
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
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
Brenda Goodman, CNN Money, 25 Nov. 2025
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
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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That’s as childish an expression as the show ever shares.—
Alison Herman,
Variety,
13 Apr. 2026
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The use of childish internet and video-game memes to describe violence is coarse and unworthy of the men and women who go in harm’s way.—
Eliot A. Cohen,
The Atlantic,
1 Apr. 2026
Adjective
-
Too naive, too immature to understand.—
Hua Hsu,
New Yorker,
20 Apr. 2026
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The landscaping was sparse and immature.—
Literary Hub,
Literary Hub,
14 Apr. 2026
Adjective
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Narrated by Josh Gad, Orangutan introduces us to Indah, an adolescent orangutan preparing to leave her family unit for the first time and venture into the wild.—
K. Thor Jensen,
PC Magazine,
17 Apr. 2026
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Recently released from prison, coach Walt Mangian joins a local youth gym to help a ragtag team of adolescent boxers aspiring to a national championship.—
Ryan Lattanzio,
IndieWire,
16 Apr. 2026
Adjective
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The driver and a juvenile boy were both taken to the hospital with unknown injuries, according to the release.—
Lauren Penington,
Denver Post,
10 Apr. 2026
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Leatherman ran toward two juvenile bystanders while Selmer ran toward downtown Emmitsburg, according to documents.—
JT Moodee Lockman,
CBS News,
9 Apr. 2026
Cite this Entry
“Infantile.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infantile. Accessed 25 Apr. 2026.
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