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deadly, baneful, pernicious, pestilent | exceedingly harmful | |
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virulent, deadly, venomous | extremely poisonous or injurious; producing venom | |
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madly, insanely, deadly, deucedly, devilishly | extremely | |
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deadly | (of a disease) having a rapid course and violent effect | |
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lethal, deadly | of an instrument of certain death | |
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mortal, deadly | [in theology] involving loss of divine grace or spiritual death | |
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deadly, deathly, mortal | causing or capable of causing death | |
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deadly, lifelessly | as if dead |