faithful的音標是[?fe?θfl]，翻譯成中文是忠誠的、忠實的。

速記技巧：fa發“發”的音，th發“思”的音，可以連讀，ful發“弗”的音。

以上內容僅供參考，建議使用英語進行學習，以獲取最準確的信息。

faithful的英文詞源為拉丁語單詞 fidus，意為忠誠的、可靠的。faithfuls的變化形式有過去式 faithful、過去分詞 faithfuls、現在分詞 faithfuling、復數 faithfuls。

相關單詞：

1. faith：信仰，信念，信心，信任；信心，信任；宗教信仰；虔誠

2. fidelity：忠誠，忠實，精確度

3. faithful：忠誠的，忠實的，如實的

4. faithfulness：忠誠，忠實

5. trust：信任，信賴；信托；委托

6. trustworthy：值得信任的

7. credulous：輕信的，易相信的

8. faithfully：忠誠地，忠實地

9. loyal：忠誠的，忠心的

10. faithfulness of character：性格上的忠誠。

faithfuls作為形容詞表示忠誠的、忠實的含義，其變化形式和相關單詞都體現了其作為形容詞的含義和用法。同時，faithfuls也體現了英語詞匯的多樣性和變化性。

常用短語：

1. be faithful to (someone)

2. be faithful in (something)

3. faithfully

4. faithful friend

5. faithful partner

6. faithfully follow

7. be faithful in word and deed

例句：

1. I am faithful to my friends and always keep my promises.

2. My husband is faithful in his work and always puts in a hard day"s work.

3. She is a faithful servant and always does as she is told.

4. My dog is a faithful companion and always follows me around.

5. I am a faithful reader of your blog and always look forward to your posts.

6. He is faithful in his word and always keeps his commitments.

7. She is a faithful friend and will always stand by you in times of need.

英文小作文：

My Faithful Companion

My dog is my faithful companion. She is always by my side, whether I am at home or out and about. She listens to me, comforts me when I am sad, and provides me with unconditional love. She is my best friend and I am grateful for her loyalty and companionship. Without her, my life would be empty. She is my faithful companion and I am grateful for her love and support.