- liable or subject to change or alteration.
- given to changing; constantly changing; fickle or inconstant: the mutable ways of fortune.
Origin of mutable
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Word Origin and History for hypermutability
late 14c., "liable to change," from Latin mutabilis "changeable," from mutare "to change," from PIE root *mei- "to change, go, move" (cf. Sanskrit methati "changes, alternates, joins, meets;" Avestan mitho "perverted, false;" Hittite mutai- "be changed into;" Latin meare "to go, pass," migrare "to move from one place to another;" Old Church Slavonic mite "alternately;" Czech mijim "to go by, pass by," Polish mijać "avoid;" Gothic maidjan "to change"); with derivatives referring to the exchange of goods and services as regulated by custom or law (cf. Latin mutuus "done in exchange," munus "service performed for the community, duty, work").