INFANTILE Synonyms: 32 Similar and Opposite Words

infantile

adjective

ˈin-fən-ˌtī(-ə)l

Definition of infantile

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

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of infantile Then, there’s this rather infantile tendency for the MAGA crowd to call any content moderation an act of censorship, which is a ludicrous distortion of the truth. — Joel Khalili, Wired News, 11 Mar. 2026 The question is if his self-serving instincts overcome his infantile rage. — Arkansas Online, 9 Mar. 2026 Among them was a treatment option for infantile hypophosphatasia, a rare form of rickets that makes children’s bones dangerously fragile. — Ashley MacKin Solomon, San Diego Union-Tribune, 27 Feb. 2026 This suggests that the immune system may be involved in infantile amnesia. — Veronique Greenwood, Time, 23 Feb. 2026 See All Example Sentences for infantile

Recent Examples of Synonyms for infantile

Adjective

There is a playful feeling to many PATTARAPHAN pieces, but this is not childish work.

— Rachel Elspeth Gross, Forbes.com, 20 Aug. 2026
And also settling a very childish dispute between the airport and the contractors.

— Business Columnist, Los Angeles Times, 20 Aug. 2026

Definition of childish

Adjective

There’s nothing wrong with holding on to childhood and being a little immature from time to time.

— Loren Savini, Allure, 22 Aug. 2026
The acclaimed writer Rachel Cusk’s controversial new novel Life of M is an intimate, unvarnished character study of an A-list movie star who is depicted as hollow, immature and cynical, an intellectual poseur and an artist wannabe.

— Gary Baum, HollywoodReporter, 19 Aug. 2026

Definition of immature

Adjective

But the increasing role of private equity firms is also driving up costs, with adolescent athletes looking at pricier options outside of rec leagues at younger and younger ages.

— Burgess Everett, semafor.com, 31 Aug. 2026
The National Institutes of Health found a 121% increase in adolescent overdose deaths between 2010 and 2021, a sobering reminder of the impact on schools.

— Nathalia Fernandez, New York Daily News, 31 Aug. 2026

Definition of adolescent

Adjective

At Monday's news conference, Detroit Police Chief Todd Bettison said the suspect, who had not yet been named, was not previously involved in the juvenile justice system.

— Natalie Davies, Freep.com, 29 Aug. 2026
Nikole Ramos was booked into jail and the teen was booked into juvenile hall for murder, police said.

— Brandon Downs, CBS News, 28 Aug. 2026

Definition of juvenile

Browse Nearby Words

infant

infantile

infantilized

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“Infantile.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infantile. Accessed 2 Sep. 2026.

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Synonyms of infantile

adjective

Example Sentences

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