precarious
Definitions
Not securely held or in position; dangerously likely to fall or collapse.
Dependent on chance; uncertain or unpredictable.
Characterized by a lack of security or stability that threatens with danger.
Examples
The climber held onto the precarious ledge, hoping his grip would not fail.
The company's financial situation remains precarious after the sudden loss of its primary investor.
She balanced the precarious stack of books on her lap while trying to drink her coffee.