Definitions

won't wash

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implausible adj.
inconceivable adj.
suspicious adj.
unbelievable adj.
unconceivable adj.

ADJECTIVE

implausible

Synonyms

STRONGEST

dubious farfetched flimsy impossible improbable inconceivable incredible unbelievable unconvincing unreasonable

WEAK

doubtful far-out fishy for the birds full of holes obscure problematic puzzling reachy suspect thin too much unsubstantial weak won't hold water

Antonyms

STRONGEST

believable convincing credible likely plausible possible realistic reasonable tenable

ADJECTIVE

inconceivable

Synonyms

STRONGEST

extraordinary implausible impossible improbable incredible mind-boggling strange unbelievable unheard-of unimaginable unthinkable

WEAK

fantastic incogitable incomprehensible insupposable phony rare reachy staggering thin unconvincing unknowable unlikely unsubstantial weak won't fly

Antonyms

STRONGEST

believable common credible familiar likely normal plausible possible reasonable tenable usual

WEAK

conceivable fathomable imaginable

ADJECTIVE

suspicious

Synonyms

STRONGEST

dubious questionable uncertain unsure unusual

WEAK

borderline debatable different disputable doubtable equivocal farfetched funny irregular not kosher open open to doubt open to question out of line overt peculiar phony problematic reaching rings untrue shady shaky suspect too much uncommon

Antonyms

STRONGEST

certain clear definite secure sure undoubted

WEAK

believable indubious innocent palpable trustworthy trusty unquestionable

ADJECTIVE

unbelievable

Synonyms

STRONGEST

astonishing implausible impossible improbable inconceivable incredible outlandish preposterous too much unimaginable unthinkable

WEAK

beyond belief cockamamie cockeyed doubtful dubious far-fetched fishy flaky flimsy for the birds full of holes harebrained incogitable kooky lamebrained open to doubt past belief phony questionable reaching scatterbrained screwy staggering suspect thick thin unconvincing unsubstantial weak won't hold water

Antonyms

STRONGEST

believable conceivable credible imaginable likely plausible possible reasonable tenable

WEAK

real

ADJECTIVE

unconceivable

Synonyms

WEAK

doubtful dubious far-out farfetched fishy flimsy for the birds full of holes impossible improbable inconceivable incredible obscure problematic puzzling reachy shaky suspect thin too much unbelievable unconvincing unreasonable unsubstantial weak won't hold water

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

won't wash

The $15 million lesson was expensive, and the suspension of Kimmel was a stain that won’t wash out easily.

From Salon ● May 13, 2026

Trying to dress it up as who has the moral high ground just won’t wash.

From Slate ● Sep. 3, 2020

That won't wash so far as Labour leader Jeremy Corbyn is concerned.

From BBC ● Aug. 29, 2019

The old saw that horse people really love their animals won’t wash anymore.

From Washington Post ● May 5, 2019

She won’t wash her hair or cut her nails on Friday.

From "Before We Were Free" by Julia Alvarez

won't wash

Example Sentences

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