risky

adjective2

1. •
   dangerous, with a real chance of harm, loss or failure

   • Investing in this start-up company could be risky.
   • Jumping on the train from the bridge to catch the terrorist was a highly risky operation.
2. •
   (no longer used) Risqué.

   • Have you no risky songs, no indecent ballads? — 1889