per·il·ous 
/ˈperələs/ adjective
/ˈperələs/ adjective [more perilous; most perilous] somewhat formal + literary : full of danger : dangerous
▪ a perilous journey across the mountains ▪ The climb was perilous.
▪ a perilous journey across the mountains ▪ The climb was perilous.
— per·il·ous·ly adverb
▪ He leaned perilously over the edge of the boat. ▪ She came perilously close to drowning. [=she almost drowned] ▪ The company was perilously close to bankruptcy.
▪ He leaned perilously over the edge of the boat. ▪ She came perilously close to drowning. [=she almost drowned] ▪ The company was perilously close to bankruptcy.
