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English definition of “peril”

peril

noun [C or U] uk   /ˈper.əl/ formal us  
great danger, or something that is very dangerous: I never felt that my life was in peril. The journey through the mountains was fraught with peril (= full of dangers). Teenagers must be warned about the perils of unsafe sex. do sth at your peril to do something that might be very dangerous for you: We underestimate the destructiveness of war at our peril.
(Definition of peril from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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