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unstable (adjective)
Not firmly fixed or likely to change, fail, or collapse suddenly. It describes physical objects that might fall, or abstract situations like emotions and economies that are unpredictable.
Think of an UN-STABLE TABLE. If a table is UNSTABLE, it will wobble and fall. The word 'table' is even hidden inside 'un...
The table is unstably. → The table is unstable.
The bridge has a lot of unstability. → The bridge has a lot of instability.
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