To expose to harm or danger; imperil.(verb-transitive)
To threaten with extinction.(verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "endanger" in a sentence
"And when they had taken security of Jason and of the other -- "the others" -- probably making them deposit a money pledge that the preachers should not again endanger the public peace."
"Israel’s refusal to accept this accommodation keeps the conflict alive and will in the longer term endanger its very existence, let alone complicating life for the rest of us and making it much more dangerous."
"The tepid reaction to the foreclosure crisis has sure felt that way -- apparently we can't freeze foreclosures or do much to help homeowners because it might "endanger" the banks."