Correct

丛生

/ cóngshēng / 
Strokes

Definition

growing as a thicket/overgrown/breaking out everywhere (of disease, social disorder etc)

Example

As a Verb

(of plants) grow rankly/thickly/in clumps; cluster together (round sth/sb); clump together; overgrow

1
Héàn
河岸
shàng
上
lúwěi
芦苇
cóngshēng
丛生
  
。

The riverbanks were overgrown with reeds.

2
Cóngshēng
丛生
de
的
yěcǎo
野草

tufted/rank/rampant weeds

3
Zácǎocóngshēng
杂草丛生

be overgrown with weeds; be choked/rank with weeds; weeds spring up

4
Jīngjí
荆棘
cóngshēng
丛生

thorns grow in clumps; be overgrown with brambles; thorns spring up

As a Verb

(of diseases, evils, etc) break out in profusion

5
Shuǐzāi
水灾
guòhòu
过后
jíbìng
疾病
cóngshēng
丛生
  
。

Outbreaks of disease occurred in the wake of the floods.

6
Bǎibìngcóngshēng
百病丛生

all kinds of diseases and ailments breaking out