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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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

The basics of investing are set out in accessible, but not childish, terms, and the little tutorials are free of any hint of edutainment or corniness.

— Marie Sapirie, Forbes.com, 20 July 2026
The portrait of Musk that emerges here is that of a childish, terminally online man who desires to eliminate the messiness of contemporary life for a more rigid order.

— The New Yorker, New Yorker, 13 July 2026

Definition of childish

Adjective

Globally, adolescent girls spend more time than boys performing household chores.

— Courtney Busch, Forbes.com, 27 July 2026
The brain’s reward and emotional systems develop earlier than the executive function centers that provide impulse control, and this imbalance peaks during the adolescent years.

— J. Todd R. Lawrence, STAT, 27 July 2026

Definition of adolescent

Adjective

Doe continued to see Drotts after the probation department released him from the juvenile facility on April 3, 2026, Burris said.

— Rick Hurd, Mercury News, 27 July 2026
Seattle Mayor Katie Wilson said the teenager was being held in juvenile detention for firearms violations and first-degree assault.

— Brady Knox, The Washington Examiner, 27 July 2026

Definition of juvenile

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infant

infantile

infantilized

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“Infantile.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infantile. Accessed 4 Aug. 2026.

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Synonyms of infantile

adjective

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