in league with
US /ɪn liɡ wɪð/
UK /ɪn liɡ wɪð/

1.
與...勾結, 與...串通
working together with someone, especially secretly, to achieve something
:
•
The rumors say he was in league with the competition.
謠言說他與競爭對手勾結。
•
She denied being in league with the protesters.
她否認與抗議者勾結。