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immature

/ɪməˈtjʊə(ɹ)/

When describing a person, "immature" is often used as a criticism to suggest that someone behaves like a child despite their actual age. In biological or botanical contexts, it simply describes the stage of growth (like fruit or plants) and is not a criticism.

💬Casual Conversation

🎬Tuesday afternoon in a quiet office breakroom, Sarah is hiding from her boss.
Jessica

David is literally sulking because I pushed the deadline. He's being so immature.

Jessica
Sarah
Sarah

Typical. Just let him stew in it while we grab coffee.

💡
Jessica uses 'immature' to describe their boss's emotional reaction to a scheduling change. Sarah responds with the phrasal verb 'stew in it', meaning to dwell on one's own annoyance or anger, reflecting her exhausted and dismissive attitude toward David's behavior.

Meanings

adjective

Not fully developed physically or mentally; lacking emotional maturity.

"His tendency to throw tantrums in public is quite immature for a thirty-year-old."

adjective

Not yet fully grown or ripened.

"The researchers analyzed the growth patterns of the immature seedlings."

Examples

Stop acting so immature and just apologize to her already!

I can't believe how immature he is during these meetings.

Honey, that's just an immature way to handle your anger.

The fruit is still too immature to pick today.

You're being completely immature right now, and it's honestly exhausting.

She is far too immature for this leadership role.

These plants look a bit immature for this climate.

Is it just me, or is he incredibly immature?

Collocations & Compounds

immature behavior

Actions that are not appropriate for one's age, typically lacking emotional maturity.

immature fruit

Fruit that has not yet ripened.

emotionally immature

Lacking the psychological development or stability expected for a certain age.

immature seedling

A young plant that has not yet reached full growth.

immature decision-making

The process of making choices without the wisdom or foresight associated with maturity.

Cultural Context

The Eternal Child: Why the "Immature" Archetype Haunts Our Psychology

In the realm of analytical psychology, Carl Jung introduced the concept of the 'Puer Aeternus', or the Eternal Boy. This archetype describes a personality pattern where an individual remains psychologically immature long after they have reached physical adulthood. It is not merely about acting like a child; it is a profound existential state characterized by a refusal to accept the limitations and responsibilities of adult life, often manifesting as a perpetual feeling of being "on the threshold" of something great that never quite arrives.

The Puer Aeternus is fascinated by the infinite possibilities of the future but terrified of the commitment required to make any one of those possibilities a reality. By remaining immature in their emotional development, they avoid the 'death' of other options. This creates a tragic paradox: in an attempt to keep all doors open, they never actually walk through any of them. In modern culture, we see this mirrored in the phenomenon of 'Peter Pan Syndrome,' where the desire to evade maturity becomes a defense mechanism against the crushing weight of social expectations and the inevitable failures that come with trying and failing.

However, there is a hidden brilliance to this immaturity. The Puer archetype is also the source of creativity, playfulness, and an unyielding sense of wonder. When integrated healthily, the "immature" spark allows adults to think outside the box and challenge stagnant traditions. The goal of psychological growth is not to kill the child within, but to marry the spontaneous energy of the immature spirit with the discipline and grounding of the mature adult.

Ultimately, the tension between maturity and immaturity defines much of the human experience. We spend our youth rushing to grow up, only to spend our adulthood nostalgic for the freedom of a time when we were considered immature. It is in this delicate balanceretaining curiosity while embracing responsibilitythat true emotional wholeness is found.

Etymology

Derived from the Latin 'immaturus', where 'in-' (meaning 'not') is prefixed to 'maturus' ('ripe' or 'mature'), which stems from 'matura' ('ripeness'). It entered English in the late 16th century, initially referring to physical ripeness before extending to mental and emotional development.

Related Words

Last Updated: May 22, 2026Report an Error