adj. 25B6; adjective
a dangerous animal : MENACING, threatening, treacherous; savage, wild, vicious, murderous, desperate; rare minacious.
dangerous wiring : HAZARDOUS, perilous, risky, high-risk, unsafe, unpredictable, precarious, insecure, touch-and-go, chancy, treacherous; informal dicey, hairy; Brit. informal dodgy.
harmless, safe.