As a Noun: 1. The stopping of something from happening, or the stopping of someone from doing something. English = prevention. 2. The prevention of someone or something from being harmed or damaged. English = protection. 3. Action taken to protect someone or something from attack. English = defence. As a Verb or Adjective: 1. To stop something from happening, or someone from doing something. English = prevent. 2. To prevent someone or something from being harmed or damaged. English = protect. 3. To do something in order to protect someone or something from attack. English = defend, guard, block. 4. To keep something or someone away which may harm or damage you. English = shield, shield off, fend off.