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mutable

[myoo-tuh-buh l] /ˈmyu tə bəl/
adjective
1.
liable or subject to change or alteration.
2.
given to changing; constantly changing; fickle or inconstant:
the mutable ways of fortune.
Origin
1350-1400
1350-1400; Middle English < Latin mūtābilis, equivalent to mūtā(re) to change + -bilis -ble
Related forms
mutability, mutableness, noun
mutably, adverb
hypermutability, noun
hypermutable, adjective
hypermutableness, noun
hypermutably, adverb
nonmutability, noun
nonmutable, adjective
nonmutableness, noun
nonmutably, adverb
unmutable, adjective
Synonyms
1. changeable, variable. 2. unstable, vacillating, unsettled, wavering, unsteady.
Antonyms
2. stable.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for more mutable

mutable

/ˈmjuːtəbəl/
adjective
1.
able to or tending to change
2.
(astrology) of or relating to four of the signs of the zodiac, Gemini, Virgo, Sagittarius, and Pisces, which are associated with the quality of adaptability Compare cardinal (sense 9), fixed (sense 10)
Derived Forms
mutability, (rare) mutableness, noun
mutably, adverb
Word Origin
C14: from Latin mūtābilis fickle, from mūtāre to change
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 more mutable
mutable
late 14c., "liable to change," from O.Prov. mutable, from L. mutabilis "changeable," from mutare "to change," from PIE base *mei- "to change, go, move" (cf. Skt. methati "changes, alternates, joins, meets;" Avestan mitho "perverted, false;" L. meare "to go, pass," migrare "to move from one place to another;" O.C.S. mite "alternately;" Czech mijim "to go by, pass by," Pol. mijam "avoid;" Goth. maidjan "to change;" Hitt. mutai- "to be changed into"); with derivatives refering to the exchange of goods and services within a society as regulated by custom or law (cf. L. mutuus "done in exchange," munus "service performed for the community, duty, work"). Related: Mutability.
Online Etymology Dictionary, © 2010 Douglas Harper
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