Correct

通同

/ tōngtóng / 
Strokes

Definition

to collude/to gang up on

Example

As a Verb

gang up (with sb); collude (with sb); conspire (with sb); be in collusion/complicity (with sb)

1
Zài
在
zhè
这
jiàn
件
shì
事
shàng
上
  
,
fēnmíng
分明
shì
是
nǐ
你
hé
和
tā
他
tōng
通
tóng
同
zuòbì
作弊
  
。

I'm certain that you must have plotted with him in the case.

2
Tōngtóng
通同
wǔbì
舞弊

act fraudulently in collusion (with sb); gang up to cheat; join together in practising fraud