Unstable

Characterized by a lack of stability; subject to change, fluctuation, or failure. 'Unstable' implies a tendency to waver, falter, or collapse, whether physically, emotionally, politically, or economically.

It suggests a condition of being easily disrupted or upset, lacking the firmness and security needed for sustained equilibrium.

The root cause can range from inherent weakness to external pressures or a combination of both, resulting in a state that is prone to sudden and often unpredictable shifts or breakdowns.

Unstable meaning with examples

• The old wooden chair was extremely Unstable, wobbling precariously with the slightest movement, making it unsafe for anyone to sit on it for extended periods, and needed immediate repair.
• After the CEO's sudden resignation, the company's stock price became Unstable, fluctuating wildly due to investor uncertainty and fueling the risk of further losses in the market.
• His emotional state was incredibly Unstable after the traumatic event; he swung between bursts of anger and bouts of inconsolable sadness, making it difficult for him to function.
• The political landscape of the small nation was deeply Unstable due to frequent changes in government and ongoing ethnic tensions, and further conflicts looked very likely.