derivational compound

例句：

1. 1. The word 'happy' is derived from the Latin word 'happī', meaning "good".
   “快乐”这个词来源于拉丁语的“happī”，意为“好”。
2. 2.Derivational compounds are often used to describe how words have evolved over time.
   派生复合词通常用于描述词语如何随着时间的推移而演变。
3. 3. In a derivational compound, the root word usually comes first, followed by other words that modify or define it.
   在派生复合词中，根词通常放在前面，后面跟着修饰或定义它的其他词。