Collusive behaviour involves secret or illegal co-operation, especially between countries or organizations.
例句
Any evidence of collusive behaviour by the banks could be sent to the Office of Fair Trading.任何能證明銀行有串通行為的證據都可以送交公平貿易部。...collusive business practices.內外串通的商業行為
英英詞典釋義
Adjective
1. acting together in secret toward a fraudulent or illegal end