coarser的音標是[?k??rs?(r)]，基本意思是“較粗糙的，粗劣的，粗略的”，可以與介詞如of，in，with等搭配表示不同的意思。

速記技巧：可以嘗試使用一些簡寫的詞匯來快速記憶這個單詞，例如coarse的縮寫可以記為[c.o.r.s]，這樣就可以快速記住這個單詞的意思和發音。

例句：The quality of the cloth is much coarser than that of last year"s. 這塊布的質量比去年的粗糙得多。

"coarser"這個詞的英文詞源可以追溯到拉丁語"coarsus"，意為粗糙的或粗略的。它的變化形式包括比較級"coarser"和最高級"coarsest"。

相關單詞：

"rough" - 來自古英語"rog"，意為粗糙的或粗略的，是"coarsus"的直接借用。

"coarseness" - 意為粗糙或粗略的程度，是"coarsus"的派生詞。

"coarsely" - 意為粗糙地或粗略地，是"coarser"的比較級形式。

"coarsen" - 意為使粗糙或粗略，是"coarsen"的動詞形式。

"coarseness of speech/behavior" - 意為言語或行為的粗魯，是"coarseness"的常見用法。

"coarsen one"s character" - 意為使某人的性格變得粗魯，是"coarsen"的進一步應用。

"coarse grain/material" - 意為粗糙的谷物或材料，是"coarsest"的常見用法之一。

"grit" - 意為堅韌不屈的精神或品質，有時也指粗糙的物質，與"coarse"有關。

"coarse sandstone" - 意為粗糙的砂巖，是"coarsest"的具體應用之一。

以上就是一些與“coarser”相關的單詞及其詞源和含義的解釋。這個詞在英語中常常用來形容事物的粗糙或粗略，也可以用來形容人的行為或言語的粗魯。

常用短語：

1. coarsely

2. coarse sand

3. coarse grained

4. coarse-grained sandstone

5. coarse-cut

6. coarse-grinding

7. coarse-textured

例句：

1. The painting was executed with a coarsely brushstroke.

2. The sand was collected from a beach with coarse grains.

3. The coarse-grained sandstone was used for building foundations.

4. The rough surface of the stone was coarsely cut to fit the design.

5. The grinding wheel was coarsely grinding the metal to remove rough edges.

6. The texture of the soil was coarse-textured, making it difficult to cultivate.

7. The texture of the sand is coarse, making it suitable for beach sports.

英文小作文：

Coarse sand is a type of sand that is characterized by its coarse texture and roughness. It is often found in deserts and beaches, where it provides a challenging and fun environment for beach sports such as sandcastle building, beach volleyball, and beach soccer. However, coarse sand can also be used for construction purposes, such as in the formation of sand dunes and other landscaping projects.

Coarse sand also has a unique texture that makes it suitable for sculpting and carving, as it can easily be shaped into various forms and textures with minimal effort. This is why coarse sand is often used in art and crafts, where it provides a unique and challenging medium for artists and craftspeople to create their works of art. In addition, coarse sand can also be used in landscaping projects to create interesting and unique patterns and designs in gardens and parks.

Coarse sand is also a valuable resource for mining operations, where it is often used to create aggregate for road construction and other infrastructure projects. However, due to its coarse texture and high abrasiveness, it can also be harmful to the environment if not properly managed and disposed of. Therefore, it is important to ensure that the use of coarse sand is sustainable and environmentally friendly, while also considering its potential benefits for society and the economy.