endangered

[en-deyn-jerd]
adjective
1.
threatened with a danger: endangered lives of trapped coal miners.
2.
threatened with extinction: The bald eagle may be endangered.

Origin:
1590–1600; endanger + -ed2

unendangered, adjective
Dictionary.com Unabridged

endanger

[en-deyn-jeyr]
verb (used with object)
to expose to danger; imperil: It was foolish to endanger your life in that way.

Origin:
1400–50; late Middle English; see en-1, danger

endangerment, noun


threaten, jeopardize, hazard, risk.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
endanger (ɪnˈdeɪndʒə)
 
vb
(tr) to put in danger or peril; imperil
 
en'dangerment
 
n

endangered (ɪnˈdeɪndʒəd)
 
adj
in danger: used esp of animals in danger of extinction: the giant panda is an endangered species

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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Etymonline
Word Origin & History

endanger
late 15c., from en- "make, put in" + danger. Related: Endangered; endangering. Endangered species first recorded 1964.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The killing of any endangered species except in defense of a human life is a
  crime.
We have lost the sciences, almost lost the social sciences, and the humanities
  are endangered.
But in the rich world newspapers are now an endangered species.
Protecting endangered species is an expensive proposition.
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