1
as in young
being in the early stage of life, growth, or development
immature frogs are called "tadpoles"
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Antonyms & Near Antonyms
2
as in childish
having or showing the annoying qualities (as silliness) associated with children
an immature teenager who still threw tantrums
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Antonyms & Near Antonyms
3
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
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Recent Examples of immature
Infant botulism is a rare but serious illness that occurs in babies under age 1, whose gut microbiomes are immature.
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ABC News,
13 June 2026
Edamame is young, immature soybeans.
—
Carrie Madormo,
Verywell Health,
8 June 2026
The products are predominantly used on newborns, infants and young children who are vulnerable to infection due to their immature immune systems, the federal agency said.
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Nick Lentz,
CBS News,
6 June 2026
The product was recalled in part due to the bacteria's higher threat to young children with immature immune systems that are more susceptible to infection.
—
Madison E. Goldberg,
PEOPLE,
6 June 2026
See All Example Sentences for immature
ABC News,
13 June 2026
Edamame is young, immature soybeans.
—
Carrie Madormo,
Verywell Health,
8 June 2026
The products are predominantly used on newborns, infants and young children who are vulnerable to infection due to their immature immune systems, the federal agency said.
—
Nick Lentz,
CBS News,
6 June 2026
The product was recalled in part due to the bacteria's higher threat to young children with immature immune systems that are more susceptible to infection.
—
Madison E. Goldberg,
PEOPLE,
6 June 2026
See All Example Sentences for immature
Recent Examples of Synonyms for immature
Adjective
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Still, younger investors are leading the charge for AI adoption.
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Most of those children are 3 years old and younger, USA TODAY has reported.
Adjective
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This one has a charming clover shape to make your space feel animated, but not childish.
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The result feels comforting without skewing childish.
Adjective
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At $18 or even $15 per hour, many companies don’t see value in hiring inexperienced teens who require extensive training to interact with customers, let alone achieve some measure of productivity.
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Lagway’s depature after 19 starts leaves the Gators to choose between two talented, yet inexperienced options with just one combined start — by Philo against Gardner-Webb in 2025.
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.
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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.
Adjective
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The researchers looked at the adolescent’s subjective perception that a device was interfering with the relationship.
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But as our adolescent hero discovers, with great imagination comes great responsibility.
Cite this Entry
“Immature.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/immature. Accessed 26 Jun. 2026.
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