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English definition of “viper”

viper

noun [C]     /ˈvaɪ.pər/ US  /-pɚ/
a small poisonous snakeReptile and amphibian names literary a very unpleasant person who you cannot trust: When I started my new job, I didn't realize that I was walking into a nest of vipers.Unpleasant people in generalUnpleasant men
(Definition of viper noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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