"gen":

含义： "gen" 表示产生、产出或产生的事物

Generate  产生，生成

The wind can generate electricity.

"geo":

含义： "geo" 表示地球或地理。

例词：

Geography: 地理学

Geology: 地质学

Geophysics: 地球物理学

general adj

In general, people prefer sunny weather 

I have a general understanding of the topic, but I need more details. 

noun

The general led the troops into battle. 

 Generous

She is always generous with her time, helping others whenever they need it. 

The chef was generous with the portions, and everyone left the restaurant feeling satisfied.