Mutable (adjective)
mu·ta·ble [myoo-tuh-buhl] (previously 07-06-13)

adjective
1. liable or subject to change or alteration.
2. given to changing; constantly changing; fickle or inconstant: the mutable ways of fortune.

OTHER WORDS FROM MUTABLE
mu·ta·bil·i·ty [myoo-tuh-bil-i-tee] mu·ta·ble·ness, noun
mu·ta·bly, adverb
hy·per·mu·ta·ble, adjective
hy·per·mu·ta·bly, adverb

WORDS RELATED TO MUTABLE
erratic, fickle, inconstant, mercurial, unreliable, vacillating, variable, wavering, alterable, fluctuating

Synonyms
See synonyms for: mutable / mutability on Thesaurus.com
1. changeable, variable.
2. unstable, vacillating, unsettled, wavering, unsteady.

Antonyms
2. stable.

Origin: 1350–1400; Middle English < Latin mutabilis, equivalent to muta ( re ) to change + -bilis -ble

EXAMPLE SENTENCES FROM THE WEB FOR MUTABLE
Vortices can be remarkably stable, and yet they are also surprisingly mutable.
AN UNEXPECTED TWIST LIGHTS UP THE SECRETS OF TURBULENCE|DAVID H. FREEDMAN|SEPTEMBER 3, 2020|QUANTA MAGAZINE

The mutable-Earth sign of Virgo is about negotiating virtue and vice.
YOUR WEEK: WHAT THE STARS HOLD|STARSKY + COX|SEPTEMBER 4, 2011|DAILY BEAST

The comic Flip Wilson used to use “The devil made me do it” as an endlessly mutable punch line.
THE GRIM TRUTH ABOUT AFRICA|STANLEY CROUCH|APRIL 21, 2010|DAILY BEAST

Yet however sweet the hours, they pass away, and it is not much memory can save from the mutable, happy days of love.
THE MAN BETWEEN|AMELIA E. BARR

Now YOU come up with a sentence (or fic? or graphic?) that best illustrates the word.