perilous
1. [ adjective ] fraught with danger
Synonyms: precarious touch-and-go parlous
Examples:

"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"

Related terms: dangerous
Similar spelling:   perilously
  peerless
  pearl_ash
  Pearlstein
  pearl_sago
  prilosec
  pearlescent