deter

de·ter /dɪˈtɚ/ verb

de·ters; de·terred; de·ter·ring

[+ obj] 1 : to cause (someone) to decide not to do something ▪ Some potential buyers will be deterred by the price. — often + from ▪ They hoped that the new law would deter advertisers from making false claims. ▪ The heavy fines should deter [=discourage] people from dumping garbage here.

2 : to prevent (something) from happening
▪ He played an important role in international efforts to deter [=prevent] nuclear war. ▪ Painting the metal will deter rust.