Risky

unsafe hazardous perilous treacherous uncertain precarious insecure tricky touchy delicate iffy ticklish dicey jeopardous fraught with danger endangered chancy sensitive unsound unhealthy touch-and-go hairy venturesome wicked on thin ice on slippery ground playing with fire out on a limb on the spot hanging by a thread speculative wide-open long shot not a prayer going for broke off the deep end