What is the Opposite(Antonym) of “childish”?

The Opposite(Antonym) of “childish”

The antonyms of childish are mature, adult, and grown-up. The antonyms mature, adult, and grown-up convey a sense of responsibility, wisdom, and experience. It implies a level of development and behavior that is expected of an adult.

Explore all Antonyms of “childish”

Definitions and Examples of mature, adult, grown-up

Learn when and how to use these words with these examples!

Fully developed in body or mind; having reached a state of full growth or development.


She showed a mature attitude towards the problem and handled it with grace.

A person who is fully grown or developed; having attained full size and strength.


He became an adult when he turned 18 and was legally responsible for his actions.


A person who is fully developed or matured; having reached a state of adulthood.


As a grown-up, she had to make her own decisions and take responsibility for her actions.

Key Differences: mature vs adult vs grown-up

  • 1Mature refers to a state of full growth or development, both physically and mentally.
  • 2Adult is a term used to describe someone who has reached the age of majority and is legally responsible for their actions.
  • 3Grown-up is a term used to describe someone who has reached a state of maturity or adulthood.

Effective Usage of mature, adult, grown-up

  • 1Professional Communication: Use mature, adult, and grown-up to convey a sense of responsibility and professionalism.
  • 2Parenting: Teach children the difference between being childish and mature.
  • 3Self-Improvement: Strive to be more mature and grown-up in your actions and decisions.

Remember this!

The antonyms have distinct nuances: Mature refers to a state of full growth or development, adult denotes legal responsibility, and grown-up refers to a state of maturity. Use these words to convey professionalism, teach children about responsibility, and strive for personal growth and development.

This content was generated with the assistance of AI technology based on RedKiwi's unique learning data. By utilizing automated AI content, we can quickly deliver a wide range of highly accurate content to users. Experience the benefits of AI by having your questions answered and receiving reliable information!