Synonyms of 'imperil'
endangerDictionary, risk, hazard
You imperilled the lives of other road users with your driving.
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To endanger something or someone means to put them in a situation where they might be harmed or destroyed completely.
This debate could endanger the peace talks.
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.
Thesaurus for imperil from the Collins English Thesaurus
Something that imperils you puts you in danger.