Synonyms of mutable

mutable

adjective

ˈmyü-tə-bəl 

as in volatile

likely to change frequently, suddenly, or unexpectedly

a politician with very mutable positions on all the issues

Synonyms & Similar Words

• volatile
• unpredictable
• changeful
• variable
• unstable
• inconsistent
• changeable
• mercurial
• uncertain
• capricious
• inconstant
• unsettled
• fickle
• fluctuating
• temperamental
• fluid
• up in the air
• unsteady
• random
• arbitrary
• erratic
• unreliable
• skittish
• flickery
• scattered
• haphazard
• ambivalent
• shaky
• stray
• aimless
• protean
• untrustworthy
• undependable
• adaptable
• versatile
• desultory
• irregular
• dicey
• slapdash
• hit-or-miss
• mobile
• vacillating
• wavering
• shilly-shally
• shilly-shallying
• hesitating

Antonyms & Near Antonyms

• immutable
• constant
• certain
• stable
• unchangeable
• unchanging
• predictable
• invariable
• steady
• stationary
• settled
• uniform
• permanent
• changeless
• persistent
• even
• unvarying
• durable
• lasting
• abiding
• reliable
• equable
• true
• dependable
• sure
• trustworthy
• trusty
• tried
• tried-and-true

Example Sentences

Recent Examples of mutable

This mutable sign is keen on what others are likely to overlook, including the small habits that determine whether something is sustainable. — Valerie Mesa, PEOPLE, 9 July 2026

The greater challenge for a film of its scale is capturing the spirit of Homer’s immortal epic, which has proven, over centuries, as mutable as the shape-shifting Proteus—and just as slippery. — Encyclopedia Britannica, 6 July 2026

The highly mutable nature of street life and the participatory character of the show means its tone can shift drastically from tour to tour, even within the same night. — Los Angeles Times, 22 June 2026

The obstacles are mutable and insidious. — Kevin Rennie, Hartford Courant, 7 Mar. 2026