1. not securely held or in position; dangerously likely to fall or collapse
2. uncertain or dependent on chance; risky

Examples

• The ladder was in a precarious position against the wall.
• She balanced precariously on the narrow ledge.
• His job situation became increasingly precarious after the layoffs.
• The company’s financial position is precarious.
• They lived in precarious circumstances, never knowing if they could pay rent.
• The peace agreement remains precarious and could collapse at any moment.
• The stack of books was precarious and ready to topple over.