"fit"的音標為/fit/，基本翻譯為"適合；安裝；使合適"。"fit"的速記技巧可以聯想到"衣服"，幫助記憶其詞義。

"fit"這個詞的詞源可以追溯到古英語中的"fitt"，意為“適合，合適”。它的變化形式包括過去式"fitted"，過去分詞"fitted"，現在分詞"fitting"，以及形容詞形式"fit"。

相關單詞：

1. "unfit"：表示不適合或不合格的意思，其詞源可以追溯到古英語中的"un-fitt"。

2. "fitness"：表示適合或健康的程度，其詞源可以追溯到拉丁語中的"fitio"，意為“使適合”。

3. "adjust"：意為“調整”，其詞源可以追溯到古英語中的"adestan"，意為“調整”。

4. "fitful"：表示斷斷續續的，其詞源可以追溯到拉丁語中的"fitum"，意為“間斷”。

5. "fittingly"：表示適合地，其詞源可以追溯到古英語中的"fittig"，意為“適合”。

6. "fitness center"：健身中心，其詞組可以理解為“適合身體鍛煉的地方”。

7. "fitness equipment"：健身器材，指的是為了鍛煉身體而設計的各種器具。

8. "fitness routine"：健身鍛煉，指的是有規律的、適合身體鍛煉的活動。

9. "fitness tracker"：健身追蹤器，是一種能夠記錄身體活動和健康狀況的設備。

10. "fitness coach"：健身教練，他們提供指導和幫助人們進行身體鍛煉。

以上就是一些與“fit”相關的單詞及其詞源和變化形式。這些單詞在英語中廣泛使用，并且與健康和身體活動密切相關。

常用短語：

1. fit in (with)：適應（某人或某環境）

例句：I hope to fit in quickly with the new team.

2. fit out：裝備，配備

例句：The ship was fitted out for scientific research.

3. fit the bill：符合要求

例句：This restaurant fits the bill for a romantic dinner.

4. be fit for：適合做某事

例句：This book is fit for all high school students.

5. be fit for service：適合服役

例句：The car was declared unfit for service after a recent accident.

6. be fit for one"s purpose：適合某人的目的

例句：This tool is perfect for my purpose.

7. be fit to burst：快要爆炸了

例句：The pressure in the car was so high that it was fit to burst.

英文小作文：

My Fitness Journey

I started my fitness journey a few months ago, when I realized that I needed to make a change in my life. I had been feeling unhealthy and out of shape, and I knew that I needed to do something about it. So, I started working out regularly and eating healthily.

Now, I feel much better and my body is stronger than it has been in years. I enjoy the feeling of accomplishment when I work out and see the results of my hard work. Fitness has become a part of my life that I enjoy and look forward to every day. I hope to keep going and achieve even better results in the future.