imperil

• emperil (dated)

im- +‎ peril

• IPA^(key): /ɪmˈpɛɹəl/

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• Rhymes: -ɛɹəl

imperil (third-person singular simple present imperils, present participle (UK) imperilling or (US) imperiling, simple past and past participle (UK) imperilled or (US) imperiled)

1. (transitive) To put into peril; to place in danger.
   • 1879, F. D. Morice, Pindar, chapter 10, page 169:

     […] they occupied the country, expelled the inhabitants, and terminated for ever the rivalry which had so long imperilled their own naval supremacy in Greece.

   • 2006 June, Jeffrey Winters, “Wind Out of Their Sails”, in Mechanical Engineering, page 31:

     Boating and fishing groups contend that the 130 [wind energy] towers would be a navigation hazard and offshore construction would imperil the fisheries.

2. (transitive) To risk or hazard.

• (put into peril): endanger

• imperilment

• implier