Synonyms of insoluble

insoluble

adjective

(ˌ)in-ˈsäl-yə-bəl 

as in impossible

incapable of being solved or accomplished

the seemingly insoluble mystery concerning the identity of the people who built these ancient structures

Synonyms & Similar Words

• impossible
• hopeless
• problematical
• unlikely
• problematic
• insolvable
• unsolvable
• insuperable
• futile
• unattainable
• impractical
• unrealizable
• undoable
• useless
• incredible
• unworkable
• impracticable
• absurd
• unusable
• questionable
• infeasible
• dubious
• improbable
• suspect
• inconceivable
• debatable
• unfeasible
• disputable
• suspicious
• implausible
• fishy
• unthinkable
• fantastical
• shaky
• unimaginable
• unbelievable
• doubtful
• ridiculous
• far-fetched
• doubtable
• outlandish
• shady
• preposterous
• fantastic

Antonyms & Near Antonyms

• soluble
• possible
• feasible
• workable
• practical
• achievable
• attainable
• useful
• applicable
• functional
• reasonable
• usable
• resolvable
• practicable
• working
• probable
• realizable
• serviceable
• likely
• doable
• useable
• acceptable
• plausible
• conceivable
• credible
• believable

Example Sentences

Recent Examples of insoluble

Yet the dilemmas posed by partition long predate 1967 and stem from a fundamentally insoluble problem. —Yousef Munayyer, Foreign Affairs, 15 Oct. 2019

Many plant foods contain both soluble and insoluble fiber, but certain grains, like oats and barley, as well as beans, fruits, and vegetables, are particularly rich in soluble fiber. —Johna Burdeos, Health, 4 Dec. 2024

In addition, zucchini is a good source of insoluble and soluble fiber, which helps stabilize blood sugar and decrease the risk of heart disease. —Bethany Thayer, Detroit Free Press, 28 Sep. 2024

That’s a smart way of dramatizing two massive, insoluble questions: whether artificial intelligence can possess free will and whether free will is itself an illusion. —Chris Klimek, Vulture, 4 Sep. 2024