le· thal ˈlē-thəl 1 a : of, relating to, or causing death death by lethal injection b : capable of causing death lethal chemicals 2 : gravely damaging or destructive : devastating a lethal attack on his reputation 3 : very potent or effective a lethal fastball also : having a high alcohol content a lethal rum punch lethality lē-ˈtha-lə-tē noun More @Wikipedia
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