WordWeb Online

1. (of flora or fauna) in imminent danger of extinction
   "an endangered species"

1. Pose a threat to; present a danger to
   "The pollution is endangering the crops"
   - jeopardize, jeopardise [Brit], menace, threaten, imperil, peril
    
2. Put in a dangerous, disadvantageous, or difficult position
   - queer, expose, scupper, peril

See also: vulnerable

Type of: affect, be, bear on, bear upon, exist, impact, touch, touch on

Encyclopedia: Endanger