Definition of imperil:
jeopard, safety, adventure, gamble, let down, jeopardize, threaten, stake, embarrass, endanger, hold back, hazard, menace, scupper, compromise, bring up against, peril, count against, disadvantage, inhibit, burden, venture, plague, expose, jeopardise, throttle.
The innovation presumably lies in the Beowulf- story, where Hrothgar and his court are depicted in such a friendly spirit that no disreputable act can be attributed to them, and consequently Hrothgar's departure home must not be allowed in any way to imperil or inconvenience the hero.- "Beowulf An Introduction to the Study of the Poem with a Discussion of the Stories of Offa and Finn", R. W. Chambers.
So soon as admitted to the presence he burst into tears, and implored the Queen to pause before she should inflict the contemplated disgrace on one whom she had hitherto so highly esteemed, and, by so doing, dishonour herself and imperil both countries.- "Project Gutenberg History of The Netherlands, 1555-1623, Complete", John Lothrop Motley.
I serve him as my hot blood dictates- and, burning with resentment that you should dare imperil my design, I searched your chamber to destroy the letter you had threatened warning the Oneidas of their coming punishment.- "The Reckoning", Robert W. Chambers.