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 curious case of infantile amnesia The phenomenon of not remembering anything from early childhood is known as infantile amnesia.
—
Aamir Khollam, Interesting Engineering, 21 Mar. 2025
If nothing else is done with those mice, that association will apparently be forgotten later in life due to infantile amnesia.
—John Timmer, Ars Technica, 21 Mar. 2025
For a long time, infantile amnesia was thought to be tied to an inability to make memories in infancy.
—Sam Walters, Discover Magazine, 20 Mar. 2025
If this is correct, is there a connection between song and the most basic infantile communication?
—Aaron Shattuck, Scientific American, 18 Feb. 2025
See All Example Sentences for infantile
Aamir Khollam, Interesting Engineering, 21 Mar. 2025
If nothing else is done with those mice, that association will apparently be forgotten later in life due to infantile amnesia.
—John Timmer, Ars Technica, 21 Mar. 2025
For a long time, infantile amnesia was thought to be tied to an inability to make memories in infancy.
—Sam Walters, Discover Magazine, 20 Mar. 2025
If this is correct, is there a connection between song and the most basic infantile communication?
—Aaron Shattuck, Scientific American, 18 Feb. 2025
See All Example Sentences for infantile
Recent Examples of Synonyms for infantile
Adjective
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She’s fallen under the sway of a fashionable worldview in which logic is paramount, and the realm of emotion and magic and even dæmons is just childish fancy.—
Lev Grossman,
The Atlantic,
23 Oct. 2025
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Back then, some of my actions were definitely a little childish, for sure.—
Jennifer Zhan,
Vulture,
21 Oct. 2025
Adjective
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Noah's sister-in-law Esther (Jackie Tohn), the Jewish character portrayed most insultingly last year, has thankfully been softened and refined, and has somehow become the lone voice of reason amongst a group of immature idiots.—
Kelly Lawler,
USA Today,
23 Oct. 2025
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Stem cells are immature cells that have the ability to turn into insulin-producing beta cells and to produce more cells like themselves.—
Tara Haelle,
Scientific American,
14 Oct. 2025
Adjective
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The Biden Administration's contrary position depended on the obvious fallacy that providing testosterone to treat a boy's endocrine disorder is the 'same treatment' as using the drug to disrupt the normal physical development of an adolescent girl suffering from psychological distress.—
Mandy Taheri,
MSNBC Newsweek,
24 Oct. 2025
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Did an adolescent Bruce really have to walk into bars and collect his father, at the urging of his mother?—
Andy Greene,
Rolling Stone,
24 Oct. 2025
Adjective
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According to the outlet, Sears was airlifted to a hospital following injuries sustained in the crash, while a juvenile passenger sitting in the back was also taken for medical treatment.—
David Chiu,
PEOPLE,
27 Oct. 2025
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Today, much of the building sits empty in north Charlotte, and local teenagers charged with crimes are sent to a state juvenile facility in Cabarrus County.—
Charlotte Observer,
Charlotte Observer,
24 Oct. 2025
Cite this Entry
“Infantile.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infantile. Accessed 29 Oct. 2025.
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