WordWeb Online

1. Of uncertain outcome; especially fraught with risk
   "an extremely chancy future on a brave new world of liquid nitrogen, tar, and smog";
   - chanceful [archaic], dicey, dodgy [Brit, informal]
    
2. Subject to accident, chance or change
   "a chancy appeal at best";
   - fluky [informal], flukey [informal], iffy

Derived forms: chanciest, chancier

See also: dangerous, uncertain, unsafe

Encyclopedia: Chancy, Switzerland