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
This suggests that the immune system may be involved in infantile amnesia.
—
Veronique Greenwood,
Time,
23 Feb. 2026
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
Veronique Greenwood,
Time,
23 Feb. 2026
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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This one has a charming clover shape to make your space feel animated, but not childish.
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The result feels comforting without skewing childish.
Adjective
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His position is assumed, in turn, by the largest of the immature fish, who, thanks to the tragedy, finally gets to grow up.
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Even Stevens was never afraid to go all out for its constant string of gags and jokes, led by Shia LaBeouf as the immature prankster Louis Stevens.
Adjective
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The researchers looked at the adolescent’s subjective perception that a device was interfering with the relationship.
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But as our adolescent hero discovers, with great imagination comes great responsibility.
Adjective
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The Union County Prosecutors Office announced that 18-year-old Vincent Battiloro of Garwood has been waived up to adult court and will be tried as an adult in connection with the murder of the two juvenile females.
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Councilman Jeremy Rivas, D-2nd, asked about the main cause of juvenile detention in Porter County and JDAI Coordinator Chante Harden said drug possession and battery stemming from family conflicts were the main causes.
Cite this Entry
“Infantile.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infantile. Accessed 28 Jun. 2026.
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