precarious

adjectives

affording no ease or reassurance
"a precarious truce"
precarious, unstable
is derived from
precariousness
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"
parlous, perilous, precarious, touch-and-go
is derived from
precariousness
not secure; beset with difficulties
"a shaky marriage"
precarious, shaky
is derived from
precariousness