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tr.v. de·terred, de·ter·ring, de·ters
1. To prevent or discourage from acting, as by means of fear or doubt: threats that did not deter her from speaking out; skin chemicals that deter predators.
2. To prevent or discourage (an action or behavior): installed surveillance cameras to deter vandalism.
3. To make less likely or prevent from happening: protocols to deter infection.
[Latin dēterrēre : dē-, de- + terrēre, to frighten.]