Correct

知趣

/ zhīqù / 
Strokes

Definition

to act tactfully/tactful/discreet

Example

As a Verb

know one's place; know how to behave in a delicate situation; be sensible/tactful

1
Tā
他
yīzài
一再
jiūchán
纠缠
tā
她
  
,
zhēn
真
bù
不
zhīqù
知趣
  
。

He has the face to pester her time and again.