grownup的音標是[?gr??n?p]，基本翻譯是“成年人；長大的人”，速記技巧是“grow+note+up”。

Grownup這個詞的詞源可以追溯到古英語中的grunewoud，這個詞是由grun（生長）和woud（力量）組成的，表示已經成長起來的人。

變化形式：

1. Grown-up：作為形容詞，表示成熟的，成年的。

2. Growth：名詞，表示生長，發育。

相關單詞：

1. Growth spurt：生長加速期，通常指兒童在某個特定階段身高和體重的快速增長。

2. Grown-up world：表示成人的世界，通常指已經獨立生活的人。

3. Adult：表示成年人，與child相對應。

4. Maturity：表示成熟，與immaturity相對。

5. Grown-up conversation：表示成年人之間的對話，通常不涉及兒童的話題。

6. Grown-up responsibilities：表示成年人的責任和義務，如工作、家庭、財務等。

7. Grown-in-character：表示隨著時間成長而形成的特點，通常與生俱來的品質不同。

8. Grown-from-the-ground-up：表示從頭開始建立起來的，通常指新成立的事物或機構。

9. Grown-together：表示一起成長，通常指團隊成員之間的默契和合作。

10. Grown-in-wisdom：表示隨著年齡增長而積累的經驗和智慧。

Grownup這個詞在英語中是一個常用的詞，它不僅表示成年人，還常常用來形容一個人成熟、有責任感、有能力處理復雜問題的特點。這個詞也常常用來形容一個環境或機構是適合成年人生活的，而不是兒童的天堂。

常用短語：

1. grown-up world

2. become a grown-up

3. grow up

4. adulthood

5. responsible for oneself

6. take care of oneself

7. adulthood responsibilities

例句：

1. I"m ready to enter the grown-up world.

2. She grew up to be a strong and independent woman.

3. He"s finally reached adulthood and is able to take care of himself.

4. As an adult, you must be responsible for your own actions.

5. I have to take care of myself now that I"m grown up.

6. It"s time to take on the responsibilities of adulthood.

英文小作文：

標題：Adulthood - A New Stage of Life

Adulthood is a time of great change and responsibility. It is a time when we must take care of ourselves and also take on the responsibilities of our role in society. Gone are the days of playing and laughing, and in their place is a newfound sense of purpose and accountability.

In adulthood, we must learn to manage our own finances, take care of our own health, and deal with the challenges of life on our own. We also have the opportunity to make a difference in the world and contribute to society in a meaningful way.

However, adulthood also brings with it new freedoms and opportunities. We can now make our own choices and decisions, pursue our dreams, and live our lives the way we want to. It is a time of self-discovery and growth, where we can learn from our mistakes and move forward with confidence and purpose.

In conclusion, adulthood is a new stage of life that brings both challenges and opportunities. It is a time of self-discovery and growth, where we must be responsible for ourselves and take on the responsibilities of our role in society. I believe that with hard work and perseverance, we can achieve our goals and make a difference in the world.