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English definition of “treacherous”

treacherous

adjective (DANGEROUS)    /ˈtretʃ.ər.əs/ US  /-ɚ-/
If the ground or sea is treacherous, it is extremely dangerous , especially because of bad weather conditions : Snow and ice have left many roads treacherous, and motorists are warned to drive slowly .Dangers and threatsDescribing bad weather
(Definition of treacherous adjective (DANGEROUS) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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