immature — not fully developed physically, emotionally, or mentally
Part of speech: ADJECTIVE
Definition: not fully developed physically, emotionally, or mentally
Pronunciation (IPA): /ɪˈmætʃʊr/
Example Sentences
- My little brother is so immature that he still believes in Santa Claus at age 15.
- The immature apples were too sour to eat.
- His immature response to criticism showed he wasn't ready for the promotion.
immature
ADJECTIVE[/ɪˈmætʃʊr/]
not fully developed physically, emotionally, or mentally

His immature behavior ruined the group project.

He made an immature decision without considering the consequences.

The immature boy became mature and built a brighter future.
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🎤Pronunciation
🌳Etymology
Origin
The word derives from Latin immaturus, a combination of the prefix im- (not) and maturus (ripe, mature). Originally used to describe fruit or grain that had not reached full ripeness, it later extended to describe persons or things lacking full development or readiness.
Breakdown
im- (not) + maturus (ripe, mature). The prefix im- negates the adjective maturus, which comes from the root maturare meaning to ripen or come to maturity.
🎵Rhyme
🔗Collocations
📝Examples
“My little brother is so immature that he still believes in Santa Claus at age 15.”
“The immature apples were too sour to eat.”
“His immature response to criticism showed he wasn't ready for the promotion.”
“She giggled at immature jokes that weren't even funny.”
📚Related Words
Synonyms
Antonyms
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