Synonyms of undependable

undependable

adjective

as in unreliable

likely to change frequently, suddenly, or unexpectedly

He finally decided he could not be with someone so undependable.

The spring weather was undependable, but we found a clear weekend for kayaking before too long.

Related Words

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

Dissimilar Words

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

Example Sentences

Recent Examples of undependable

And then there’s Kimberly’s home life, which features an emotionally and physically fragile mom preparing to give birth and an undependable alcoholic father. — Rob Hubbard, Twin Cities, 25 Feb. 2026

Yasmin, who was ousted from Pierpoint after a tabloid scandal involving her publishing-magnate father threatened to sully the bank by association, has turned to another undependable man for salvation, proposing to an aristocratic failson called Sir Henry Muck (Kit Harington). — Inkoo Kang, New Yorker, 9 Feb. 2026

Food, water and other resources would have to be shipped from home, at distances that make the supply frighteningly undependable. — Michael Hiltzik, Los Angeles Times, 16 Oct. 2024

That includes Nessel, whose lawsuit against PBMs, filed April 28, argues that having a local pharmacy option is important for elderly patients, those with undependable mail service, those with complicated prescription regimens and patients in immediate need of medication. — Jc Reindl, Freep.com, 8 Mar. 2024