immature
Still developing, unripe
Immature describes something not fully developed or grown: immature fruit, immature cells.
Applied to people, it suggests childish behavior inappropriate for one's age—emotional volatility, poor judgment, or inability to take responsibility: His reaction was immature.
The word carries judgment; calling someone immature implies they should know better.
Lacking practical knowledge
- gullibleEasily deceived
- innocentFree from moral wrong
- trustingInclined to believe others
- unworldlyLacking practical awareness
guileless · unsophisticated · credulous · artless · sheltered · green · uninitiated · unwise
Immature in manner
- juvenileYoung person or animal
- petulantChildishly bad-tempered
- poutySullen in expression
- whinyInclined to complain
bratty · sulky · tantrums · impulsive · spoiled · irresponsible · misbehave · reckless
Lacking necessary parts
- embryonicAt earliest developmental stage
- incipientStarting to develop
- nascentBeginning to develop
- rudimentaryIn simplest possible form
unfinished · half-formed · primitive · unpolished · rough · crude · fledgling · preliminary
Person in puberty
- pubertySexual development stage
- growthIncrease in size
- developmentProgress toward maturity
- teenagerPerson aged thirteen-nineteen
youth · growing · formative · transitional · emerging · unformed · undeveloped · prepubescent
inexperienced
Lacking practical knowledge
unworldly · guileless · unsophisticated · credulous · artless · sheltered · green · uninitiated · unwise · impressionable
childish
Immature in manner
whiny · bratty · sulky · tantrums · impulsive · spoiled · irresponsible · misbehave · reckless · rude
incomplete
Lacking necessary parts
rudimentary · unfinished · half-formed · primitive · unpolished · rough · crude · fledgling · preliminary · early-stage
adolescent
Person in puberty
- pubertySexual development stage
- growthIncrease in size
- developmentProgress toward maturity
teenager · youth · growing · formative · transitional · emerging · unformed · undeveloped · prepubescent · preadolescent
green
Color of vegetation
- unripeNot ready for harvest
- undevelopedNot fully formed
- youngNot yet mature
tender · early · unready · raw · sour · hard · tart · bitter · inedible
- immaturitychildish, juvenile, infantile, puerile, babyish
- childhoodchildhood, baby, child, kid, toys
- age termsyoung, old, older, younger, youngest
- childlike traitsplayful, curious, innocent, imaginative, young
- food qualitiesripe, unripe, overripe, fresh, spoiled
- growth stagesdeveloping, adult, juvenile, young, old
immaturemature
Fully grown or developed
adult · grown · full-grown · developed · grown-up
immaturemature
Fully grown or developed
grown-up · adult · responsible · level-headed · sensible
immatureexperienced
Having practical knowledge gained
seasoned · worldly · worldly-wise · wise · sophisticated