chancy

Adjective

• subject to accident or chance or change
  • a chancy appeal at best
    
  • getting that job was definitely fluky
    
  • a fluky wind
    
  • an iffy proposition
    

• of uncertain outcome; especially fraught with risk
  • an extremely dicey future on a brave new world of liquid nitrogen, tar, and smog- New Yorker
    

Related words

• Synonyms: 
  fluky , flukey , iffy , chanceful , dicey , dodgy