unsafe in WordNet English dictionary

1. involving or causing danger or risk; liable to hurt or harm
   "a dangerous criminal"; "a dangerous bridge"; "unemployment reached dangerous proportions"
   dangerous  unsafe 
   
2. lacking in security or safety
   "his fortune was increasingly insecure"; "an insecure future"
   insecure  unsafe 
   
3. not safe from attack
   insecure  unsafe 
   

unsafe in English Wiktionary