Answer: Boycott
Explanation:
A Boycott in the traditional sense refers to when entities be it people or organizations, decide to stop transacting with another party thereby refusing to either buy, sell to or use the boycotted party's products or engage in an activity related to the boycotted entity.
In terms of business therefore, when competition firms agree to a concerted refusal to deal with a third party in any way, they are boycotting that third party.
