TREACHEROUS


Meaning of TREACHEROUS in English

treach ‧ e ‧ rous /ˈtretʃərəs/ BrE AmE adjective

1 . someone who is treacherous cannot be trusted because they are not loyal and secretly intend to harm you:

a sly and treacherous woman

a treacherous plot to overthrow the leader

2 . ground, roads, weather conditions etc that are treacherous are particularly dangerous because you cannot see the dangers very easily:

treacherous mountain roads

Strong winds and loose rocks made climbing treacherous.

—treacherously adverb

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THESAURUS

▪ dangerous likely to cause death or serious harm, or cause something bad to happen:

Snow and ice are making driving conditions very dangerous.

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dangerous drugs

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a dangerous criminal

▪ risky if something is risky, something bad could easily happen or you could easily make a mistake:

Doctors said it was too risky to operate.

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a risky situation

▪ hazardous /ˈhæzədəs $ -zər-/ especially written dangerous – used especially about substances, jobs, and journeys:

hazardous waste

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hazardous chemicals

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hazardous occupations

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The expedition was extremely hazardous.

▪ unsafe dangerous because someone is very likely to be hurt – used especially about places or conditions:

The roads are unsafe for cyclists.

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unsafe working conditions

▪ treacherous /ˈtretʃərəs/ formal literary places or conditions that are treacherous are very dangerous for anyone who is walking, driving, climbing etc in them:

The snow turned to ice, making conditions treacherous for walkers.

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the island’s treacherous coastline

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With no lighting, the roads can be treacherous.

▪ perilous /ˈperələs, ˈperɪləs/ literary a perilous journey, situation etc is very dangerous:

a perilous journey across the sea

▪ high-risk [only before noun] a high-risk job, situation, or behaviour is likely to be dangerous:

Drug users need to know that sharing needles is high-risk behaviour.

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.