Part 2 字根 表示{现象}的字根 und = flow, overflow 流动，泛滥
入门字
abundant (a.) 大量的，充足的
ab/ und/ ant
from/ overflow/ 形容词字尾
进阶字
1. undulate (v.) 起伏
und/ ul/ ate
flow/ 动词字尾
From the top of the hill, you can see undulating fields stretching to the horizon.
站在山丘上，你可以看到起伏的原野绵延到天边。
2. abound (v.) 富于，充斥
ab/ (o)und
from/ overflow
The waters around Taiwan abound in fish.
台湾沿海水域富于渔产。
3. inundate (v.) 淹没
in/ und/ ate
in/ overflow/ 动词字尾
Millions of acres of land were inundated in last year's Yangtze River floods.
几百万英尺的陆地在去年长江洪水中淹没。
4. redundant (a) 累赘的
re(d)/ und/ ant
again/ overflow/ 形容词字尾
The word “most”in the expression “most extreme”is quite redundant.
[最极端]一词中的[最]字完全是多余的。