Correct

流毒

/ liúdú /
Strokes

Definition

to spread poison/pernicious influence

Example

As a Verb

exert a pernicious/baneful influence

1
Liú
流毒
fāng
四方
  
/
qíong
无穷

exert a widespread/an endless pernicious influence

As a Noun

harmful effect; pernicious influence

2
qīng
肃清
liú
流毒

liquidate a pernicious influence