Risky
Synonyms: Dangerous, high-risk, perilous, insecure, defenceless, touch-and-go, treacherous, unpredictable, chancy, sticky, dodgy, parlous, fraught with danger, hazardous, unsafe, exposed, precarious, tricky, uncertain, speculative, dicey, hairy, and gnarly.
Example Sentences
Climbing the mountain without proper gear is risky.
Starting a new business can be a risky endeavor.
It’s risky to invest in unstable markets.
His risky behavior on the road worried his friends.
The doctor warned that the surgery might be risky.