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instable

[in-stey-buh l] /ɪnˈsteɪ bəl/
adjective
1.
not stable; unstable.
Origin
late Middle English
1375-1425
1375-1425; late Middle English < Latin instabilis. See in-3, stable2
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for in-stable

instable

/ɪnˈsteɪbəl/
adjective
1.
a less common word for unstable
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-stable

instable

adj.

c.1400, from Latin instabilis, from in- "not, opposite of" (see in- (1)) + stabilis (see stable). Now mostly replaced by unstable.

Online Etymology Dictionary, © 2010 Douglas Harper
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Word Value for in

2
3
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