IMMATURE Synonyms: 101 Similar and Opposite Words

immature

adjective

ˌi-mə-ˈchu̇r

Definition of immature

as in young

being in the early stage of life, growth, or development immature frogs are called "tadpoles"

Synonyms & Similar Words

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Antonyms & Near Antonyms

as in childish

having or showing the annoying qualities (as silliness) associated with children an immature teenager who still threw tantrums

Synonyms & Similar Words

Antonyms & Near Antonyms

as in inexperienced

lacking in adult experience or maturity many high school students are still too immature to foresee the consequences of their actions

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Antonyms & Near Antonyms

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 immature The immature boy-king Richard II (Woody Norman) is racked with nightmares and unable to govern. — Bilge Ebiri, Vulture, 11 Sep. 2026 Top 5 most iconic college live mascot moments Reggie was an immature male and the zoo believed he was injured from a collision with a truck. — Maddie Rhodes, USA Today, 9 Sep. 2026 Harvesting too early on immature beds also affects the maturation of the rice kernels over time, officials said. — Frank Vaisvilas, jsonline.com, 9 Sep. 2026 Tests revealed that Matias had neuroblastoma, a rare childhood cancer that develops from immature nerve cells, per the Cleveland Clinic. — Angelique Brenes, PEOPLE, 1 Sep. 2026 See All Example Sentences for immature

Recent Examples of Synonyms for immature

Adjective

That young Israelis are drifting right is in many ways a reflection of how Israeli society differs from other wealthy democracies.

— Yarden Segev, NBC news, 27 Oct. 2026
But after Vucic conceded defeat Sunday evening, ecstatic young revelers filled the streets of Belgrade and ripped down the cordons around the encampment known as Caciland.

— JOVANA GEC, Arkansas Online, 27 Oct. 2026

Definition of young

Adjective

Yet my first response was a childish pride that Dad had been deemed important enough to attract Hoover’s attention.

— Literary Hub, Literary Hub, 26 Oct. 2026
There has always been a childish aspect to him — in a good way — and his curiosity hasn’t dimmed even as his age has advanced.

— Samantha Conti, Footwear News, 23 Oct. 2026

Definition of childish

Adjective

Right tackle Joe Alt (neck) and left guard Kayode Awosika (fibula) remain out, meaning rookie center Jake Slaughter will continue to anchor a front that has featured several inexperienced players over the last two games.

— Joaquin Ruiz, Los Angeles Times, 17 Oct. 2026
These experienced and skilled athletes, who are often 22 or 23 years old, are appealing to coaches, especially when compared with inexperienced and physically less developed freshmen.

— Michael McCann, Sportico.com, 14 Oct. 2026

Definition of inexperienced

Adjective

Proceedings opened this week in a case that’s shone a spotlight on Japan’s treatment of juvenile suspects.

— Hanako Montgomery, CNN Money, 24 Oct. 2026
That was the case this past weekend, as footage of bands of juvenile cows dashing through the streets of Kansas City stampeded across the internet.

— Marina Bolotnikova, Vox, 24 Oct. 2026

Definition of juvenile

Adjective

Many of us have watched the debate about links between social media use and adolescent mental health run for more than a decade without consensus, thanks in part to the lack of necessary measurement infrastructure to inform policymakers.

— Ned Cooper, STAT, 26 Oct. 2026
This month, the brand has introduced a sixth scent with Havana Tonka—a decadent fragrance with nothing adolescent about it.

— Conçetta Ciarlo, Vogue, 23 Oct. 2026