dangerous

adjective

1 a dangerous wild animal:

menacing, threatening, treacherous;

savage, wild, vicious, murderous, desperate;

rare minacious.

▷antonyms harmless.

2 overloading a power socket is dangerous:

hazardous, perilous, risky, high-risk, fraught with danger, unsafe, uncertain, unpredictable, precarious, insecure, exposed, vulnerable, touch-and-go, chancy, tricky, treacherous;

breakneck, reckless, daredevil;

Scottish unchancy;

informal warm, dicey, sticky, hairy;

British, informal dodgy;

North American, informal gnarly.

▷antonyms safe.