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 having reached maturity
“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 reaching a date at which payment is due
“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 not posing any risk of harm or hurt
“She was completely unreliable with looking after the children, as you can tell from their disheveled state.”
Adjective
(of a person) Opposite of having emotional or mental peace
“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 familiar with and at ease in many different countries and cultures
Adjective
Opposite of characterized by exceptionally early development or maturity
Adjective
Opposite of to be paid
Adjective
Opposite of having or showing good sense or judgment
Adjective
Opposite of deserving of trust, or able to be trusted reliably
“Edward had no intention of allowing his untrustworthy brother an independent fiefdom in Europe from which perhaps to launch another attempt to make himself king of England.”
Adjective
Opposite of vulgar or indecent in nature or quality
Adjective
(of food) Opposite of ready for consumption
“So we set up a platform in a tree next to a fig tree that was bulging with unripened fruit.”
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, old or ripe
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 become mature, old or ripe
“Food will spoil if left on the counter at room temperature for too long.”
Verb
Opposite of to be exceptionally proficient in an activity or subject
“He had the perfect physique to be a professional athlete, which was so ironic considering his innate ability to fail at every sport he played.”
Verb
Opposite of to undergo metamorphosis
Verb
Opposite of to teach, train or educate in a given field
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