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.—
Julia Harrison,
Architectural Digest,
12 June 2026
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The result feels comforting without skewing childish.—
Lauren Jarvis-Gibson,
Sacbee.com,
12 June 2026
Adjective
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The first thing a stressed cucumber plant will do is drop blossoms and immature fruit, says Gorlin-Crenshaw.—
SJ McShane,
Martha Stewart,
18 June 2026
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The repetition accounts for immature pollen grains and mediates weather challenges by offering multiple opportunities for the pollen to transfer to the stigma.—
Megan Hughes,
Better Homes & Gardens,
18 June 2026
Adjective
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The researchers looked at the adolescent’s subjective perception that a device was interfering with the relationship.—
Katia Hetter,
CNN Money,
20 June 2026
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But as our adolescent hero discovers, with great imagination comes great responsibility.—
Skyler Trepel,
Entertainment Weekly,
20 June 2026
Adjective
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According to police, one woman was shot in the extremity, two juvenile males had lower extremity injuries, and an adult male and female with lower extremity injuries were admitted into area hospitals, all with non-life-threatening injuries.—
CBS Baltimore Staff,
CBS News,
21 June 2026
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Nina Fróes, who was fired from her Chelmsford, Massachusetts, courtroom in April, had covered a juvenile docket toward the end of her tenure.—
E. Tammy Kim,
New Yorker,
20 June 2026
Cite this Entry
“Infantile.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infantile. Accessed 22 Jun. 2026.
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