Synonyms of 'imperil'
endangerDictionary, risk, hazardYou imperilled the lives of other road users with your driving.
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If you hazard someone or something, you put them into a situation which might be dangerous for them.
He could not believe that the man would have hazarded his grandson.
To jeopardize a situation or activity means to do something that may destroy it or cause it to fail.
The talks may still be jeopardized by disputes.
Thesaurus for imperil from the Collins English Thesaurus
Something that imperils you puts you in danger.