precarious precarious /priːˈkɛriːəs/

adjective

1. () Affording no ease or reassurance  ( unstable , precarious )
   affording no ease or reassurance
    A precarious truce
   a precarious truce
   
2. () Fraught with danger  ( parlous , touch-and-go , precarious , perilous )
   fraught with danger
    Dangerous waters
   dangerous waters
    A parlous journey on stormy seas
   a parlous journey on stormy seas
    A perilous voyage across the Atlantic in a small boat
   a perilous voyage across the Atlantic in a small boat
    The precarious life of an undersea diver
   the precarious life of an undersea diver
    Dangerous surgery followed by a touch-and-go recovery
   dangerous surgery followed by a touch-and-go recovery
   
3. Not secure; beset with difficulties  ( precarious , shaky )
   not secure; beset with difficulties
    A shaky marriage
   a shaky marriage