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1. Dictionary

   Un·sta·ble

   /ˌənˈstāb(ə)l/

   

   adjective

   • 1. likely to give way; not stable: "the unstable cliff tops" Similar unsteadyrockywobblywobblingricketyshakytotterytotteringteeteringdodderyunsafeunbalancedunreliableinsecurenot secureunfastenedunsecuredmovableprecariousbocketyOpposite stablesteady
   • ▪ likely to change or fail; not firmly established: "some students found themselves in unstable housing situations" Similar changeablevolatilevariableunsettledfluctuatinginconstantinconsistentirregularfitfulunpredictableunreliableficklecapriciousmercurialerraticuncertainwaveringinformal:peakyOpposite stablefirm
   • ▪ prone to psychiatric problems or sudden changes of mood: "he was mentally unstable" Similar unbalancedof unsound mindmentally illderangeddementedcrazeddistractedtroubleddisturbedunhingedinsanemadmad as a hattermad as a March hareraving madlunaticout of one's mind/headnot in one's right mindneuroticpsychoticnon compos mentissectionableinformal:crazyloopyloonymixed upnutsnuttynutty as a fruitcakebananascrackedcrackpotdippyscrewybatscuckoobonkersmentalscrewed upnot all thereoff one's headout to luncha bit lackingaround the benddaftbarmycrackersbarkingbarking madbattydottypottyoff one's trolley/rockerdaft as a brushnot the full shillinground the twistaway with the fairiesnutsynutsosquirrellywackobuggydated:touchedOpposite stablebalanced

   Derivatives

   • 1. unstableness noun
   • 2. unstably adverb

   Scrabble Points: 10

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   • L

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2. www.merriam-webster.com › dictionary › unstableUnstable Definition & Meaning - Merriam-Webster

   www.merriam-webster.com › dictionary › unstable

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   Learn the meaning of unstable, an adjective that describes something that is not stable, firm, or constant. See synonyms, examples, word history, and related phrases of unstable.

3. dictionary.cambridge.org › dictionary › englishUNSTABLE | English meaning - Cambridge Dictionary

   dictionary.cambridge.org › dictionary › english

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   Unstable means not solid and firm and therefore not strong, safe, or likely to last. It can also describe a person who suffers from sudden and extreme changes of mental state. See synonyms, pronunciation, and translations of unstable.

4. www.dictionary.com › browse › unstableUNSTABLE Definition & Meaning | Dictionary.com

   www.dictionary.com › browse › unstable

   • Cached

   not stable; not firm or firmly fixed; unsteady. liable to fall or sway. Synonyms: precarious. unsteadfast; inconstant; wavering: unstable convictions. Synonyms: vacillating. marked by emotional instability: an unstable person. irregular in movement: an unstable heartbeat.

5. www.vocabulary.com › dictionary › unstableUnstable - Definition, Meaning & Synonyms | Vocabulary.com

   www.vocabulary.com › dictionary › unstable

   adjective. lacking stability or fixity or firmness. “ unstable political conditions”. “the tower proved to be unstable in the high wind”. “an unstable world economy”. synonyms: inconstant. likely to change frequently often without apparent or cogent reason; variable. impermanent, temporary.

6. www.thefreedictionary.com › unstableUnstable - definition of unstable by The Free Dictionary

   www.thefreedictionary.com › unstable

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   Unstable means lacking stability, fixity, or firmness, or liable to change or fluctuate quickly. Find different meanings, examples, and translations of unstable in various contexts, such as chemistry, physics, and psychology.

7. www.collinsdictionary.com › english › unstableUNSTABLE definition and meaning | Collins English Dictionary

   www.collinsdictionary.com › english › unstable

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   2 days ago · Unstable means likely to change suddenly or easily upset, or unsteady or unreliable. It can also describe objects that are prone to decompose or radioactive particles that have a short lifetime.

8. www.oxfordlearnersdictionaries.com › us › definitionunstable adjective - Definition, pictures, pronunciation and ...

   www.oxfordlearnersdictionaries.com › us › definition

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   Unstable means likely to change suddenly or not staying in the same state. Learn how to use this adjective with synonyms, collocations and pictures from OxfordLearnersDictionaries.com.