Correct

相知

/ xiāng zhī / 
Strokes

Example

As a Verb

know each other well

1
Xiāngzhī
相知
wúyí
无疑
  
。

Suspicion will not corrode their mutual understanding.

2
Xiāngzhī
相知
duōnián
多年

have known each other long

As a Noun

bosom/close friend