colourfast

colourfast的音标为：[ˈkʌləˌfɑːst] ，中文翻译为"耐洗的，不褪色的"。

速记技巧：使用词根词缀记忆法，其中colour为“颜色”的意思，fast为“快速的”的意思，组合起来可以理解为“颜色不容易褪色”。

Colourfast这个词的英文词源可以追溯到拉丁语词根“color”和“fastus”，意为“坚固的，耐久的”。它的变化形式包括其过去式“colourfast”和过去分词“colourfast”。

相关单词：

1. “Colours” - 源自拉丁语词根“color”，意为颜色。

2. “Fade” - 源自古英语词根，意为“消失，减弱”，与colourfast相反。

3. “Permanent” - 源自拉丁语词根“per”和“manere”，意为“持续的，不变的”，与colourfast有相似含义。

4. “Stain” - 源自中世纪英语词根，意为“污染，污渍”，与colourfast相反。

5. “Fasten” - 源自拉丁语词根“fastus”和动词词尾，意为“固定，绑住”，与colourfast有相似含义。

6. “Unfasten” - 意为“解开，松开”，与“fasten”相反。

7. “Vivid” - 源自拉丁语词根“vivus”，意为“生动的，鲜明的”，与colourfast表示的颜色鲜明、持久的特点相符。

8. “Durable” - 意为“耐用的，持久的”，与colourfast表示的颜色持久的特点相符。

9. “Fadeless” - 意为“不褪色的”，与colourfast表示的颜色持久的特点相符。

10. “Stale” - 意为“陈旧的，过时的”，与颜色新鲜、持久的特点相反。

以上单词都与colourfast这个词有密切关联，并且描述了颜色在不同方面的特征。

常用短语：

1. colourfast dyes 固色染料

2. colourfastness test 固色牢度测试

3. colourfastness rating 固色等级

4. colourfastness guarantee 固色保证

5. colourfastness after washing 洗后颜色保持

6. colourfastness underwear 耐洗内衣色牢度

7. colourfastness of fabric 面料颜色保持力

双语句例：

1. The fabric is highly colourfast and will maintain its original hue even after multiple washings. （面料耐洗，颜色保持力强，多次洗涤后仍能保持原色。）

2. The dye used in our clothes is highly colourfast, ensuring that they will not fade even after prolonged exposure to sunlight. （我们衣服所用的染料具有很高的固色牢度，可以确保衣物即使在长时间暴露于阳光下也不会褪色。）

3. The colourfastness of this fabric is excellent, making it suitable for use in high-end clothing brands. （这种面料的颜色保持力非常好，适合用于高端服装品牌。）

4. We recommend using a mild detergent and avoiding exposure to harsh chemicals to ensure the colourfastness of your clothes. （我们建议使用温和的洗涤剂，并避免接触强酸强碱化学品，以确保衣物的颜色保持力。）

5. The colourfastness of this shirt is excellent, making it suitable for both casual and formal occasions. （这件衬衫的颜色保持力非常好，适合休闲和正式场合。）

6. The colourfastness of our socks is guaranteed, ensuring that they will maintain their original hue even after multiple wears. （我们的袜子颜色保持力有保证，可以确保袜子多次洗涤后仍能保持原色。）

7. The use of colourfast dyes ensures that our products will maintain their original hues for a long time. （使用固色染料可以确保我们的产品长时间保持原色。）

英文小作文：

Colourfastness is an important factor in determining the quality of a product, especially when it comes to clothing and textiles. When choosing clothes, we often look for items that will maintain their original hues for a long time, without fading or bleeding color onto other clothes or fabrics nearby. This is especially important for underwear, socks, and other items that are frequently washed and worn. Therefore, it is essential to ensure that the dyes used in the production process are colorfast, which means they will not fade or wash off easily. Using high-quality colorfast dyes ensures that clothing items will maintain their original hues for a long time, making them more durable and more suitable for frequent wear and washing. Additionally, colorfastness testing should be conducted on each batch of fabric to ensure that the dyes used are effective and durable, and that the finished product meets the required standards for colorfastness. Therefore, when choosing clothes, it is essential to look for items that have been produced using high-quality colorfast dyes, ensuring that they will maintain their original hues for a long time and providing maximum wearability and durability.