What is the opposite of mature?

Need antonyms for mature? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Opposite of fully grown or developed
“This young boy still has a lot to learn about manners.”
Adjective
Opposite of sensible and balanced in personality and emotional behavior
“For a grown woman, she sure acts like an immature and petulant child.”
Adjective
Opposite of having much experience in a particular field
“They are too young and inexperienced to be handling such dangerous machinery.”
Adjective
Opposite of used euphemistically to describe someone middle-aged or old
“He still looked youthful despite his age.”
Adjective
(of certain foods or drinks) Opposite of ready for consumption
“Ripe mangoes are eaten for dessert while pickles and chutney are prepared from unripe fruit.”
Adjective
(of thought or planning) Opposite of careful or thorough in nature
“Any rash or ill-considered decision can have repercussions on the stability of this country.”
Adjective
(of technology) Opposite of in a late stage of development
“The eatery was using an incredibly unevolved method of processing credit cards.”
Adjective
Opposite of having reached the date at which payment is required
“We have some undue bills that we don't have to worry about for a few weeks.”
Adjective
Opposite of dealing in or with explicit material suitable only for grown-ups
“The movie was innocent enough for children to watch.”
Adjective
(attributive to a person) Opposite of balanced, faithful in mind
“She was completely unreliable with looking after the children, as you can tell from their disheveled state.”
Adjective
(of a person) Opposite of free from emotional or mental agitation
“But that is as far as I can go in praising this decrepit and unbalanced person.”
Adjective
Opposite of has been in possession or usage over a long period
“Our new winter collection is going to be bigger and better this year.”
Adjective
Opposite of advanced or mature in development
“Our new player is very athletic, but her skills are still very raw and undeveloped.”
Adjective
Opposite of characterized by exceptionally early development or maturity
Adjective
Opposite of familiar with and at ease in many different countries and cultures
Adjective
Opposite of deserving of trust, reliable
Adjective
Opposite of to be paid
Adjective
Opposite of covered by growth
Adjective
Opposite of having or showing good sense or judgment
Adjective
Opposite of depicting or referring to sexual matters in a way that is unacceptable in polite society
Verb
(of a person or thing) Opposite of to become fully grown or developed
“As our bodies get older, it is likely to shrink.”
Verb
Opposite of to come to fruition
“Incredibly, the technology would actually regress after being effectively forgotten about.”
Verb
Opposite of to become mature
Verb
Opposite of to make experienced
Verb
(a business) Opposite of to advance, develop, or expand
“After being at the forefront of manufacturing for the last decade, the company's profits were starting to decline due to a lack of innovation.”
Verb
Opposite of to develop or be developed
Verb
Opposite of to cause to acquire knowledge or skill in some field
Verb
Opposite of to undergo metamorphosis
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