verb (used with object), imperiled, imperiling or (especially British) imperilled, imperilling.
to put in peril or danger; endanger.

1590–1600; im-1 + peril

imperilment, noun

risk, jeopardize, hazard, chance. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
imperil (ɪmˈpɛrɪl)
vb , or (US) -rils, -rilling, -rilled, -rils, -riling, -riled
(tr) to place in danger or jeopardy; endanger

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Example sentences
And some percentage of humans will seek out mood-altering substances or experiences that imperil their lives.
Business groups have argued that imposing the stricter pollution limits now would imperil growth.
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