full of danger or risk; causing danger; perilous; risky; hazardous; unsafe.

able or likely to cause physical injury

a dangerous criminal.

adjective

careful , guarded , safe , secure , unhazardous , untroubled

adjective

alarming , bad , breakneck * , chancy , critical , dangersome , deadly , delicate , dynamite , exposed , fatal , formidable , hairy * , heavy * , hot * , impending , impregnable , insecure , jeopardous , loaded , malignant , menacing , mortal , nasty , on collision course , parlous , perilous , portentous , precarious , pressing , queasy , risky , serious , serpentine , shaky , speculative , terrible , thorny * , threatening , ticklish * , touch-and-go , touchy , treacherous , ugly * , unhealthy , unsafe , unstable , urgent , viperous , vulnerable , wicked , adventurous , hazardous , venturesome , venturous , grave , severe , hairy , imminent , unsound