IPA: /kəˈluːʒən/
KK: /kəˈluːʒən/
A secret agreement made by two or more people or groups to do something illegal or dishonest.
The two companies were accused of collusion to fix prices.
Collusion → It is formed from "col-" (meaning together) and "ludere" (meaning to play). The word describes a secret agreement or cooperation between parties to deceive or defraud others, implying they are 'playing together' in a dishonest manner.
Think of people 'together' ('col-') 'playing' ('ludere') in a secretive way — that's why collusion means a secret agreement to deceive.