perilous

fraught with danger; "dangerous waters"; "a parlous journey on stormy seas"; "a perilous voyage across the Atlantic in a small boat"; "the precarious life of an undersea diver"; "dangerous surgery followed by a touch-and-go recovery"

विभिन्न राज्यों में अठारह वर्ष से कम आयु में विवाहित हो रही लड़कियों का प्रतिशत खतरनाक है-

The task was not only dangerous but perilous and Savarkar used his uncanny intelligence and ingenuity.