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instability

[in-stuh-bil-i-tee] /ˌɪn stəˈbɪl ɪ ti/
noun
1.
the quality or state of being unstable; lack of stability or firmness.
2.
the tendency to behave in an unpredictable, changeable, or erratic manner:
emotional instability.
Origin
late Middle English
1375-1425
1375-1425; late Middle English instabilite < Latin instabilitās. See in-3, stability
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for in stability

instability

/ˌɪnstəˈbɪlɪtɪ/
noun (pl) -ties
1.
lack of stability or steadiness
2.
tendency to variable or unpredictable behaviour
3.
(physics) a fast growing disturbance or wave in a plasma
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for in stability
instability
c.1422, from M.Fr. instabilite, from L. instabilitatem (nom. instabilitas) "unsteadiness," from instabilis "unsteady," from in- "not" + stabilis (see stable (2)).
Online Etymology Dictionary, © 2010 Douglas Harper
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Word Value for in

2
3
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