Boycott
/ˈbɔɪkɒt/ verb mediumTo refuse to buy, use, or take part in something as a way of protesting against it.
Consumers threatened to boycott the brand after reports of unfair factory conditions emerged.
Memory Trick
The word comes from a real 1880s landlord named Boycott whom an entire community refused to deal with. Today, to boycott means to refuse something the same collective way.