Definition for Uncertain:

• especially in the negative" no uncertain," as in" spoke in no uncertain terms"

Synonyms for Uncertain:

• adj.

  •at issue (adjective)
  • controversial.
  •cautious (adjective)
  • leery.
  •chance (adjective)
  • fluky.
  •chancy (adjective)
  • potluck,
  • haphazard,
  • fluky,
  • aimless,
  • risky,
  • hazardous,
  • lucky,
  • coin toss,
  • speculative,
  • causeless,
  • accidental,
  • hit-or-miss,
  • chance,
  • iffy,
  • random.
  •changeable (adjective)
  • shifting,
  • flighty,
  • unpredictable,
  • changeful,
  • inconstant,
  • mercurial,
  • mutable.
  •changing (adjective)
  • vacillating.
  •circumstantial (adjective)
  • indirect,
  • episodic,
  • presumptive,
  • landmark,
  • circumstantial,
  • inferential,
  • eventual,
  • occasional,
  • incidental,
  • inconclusive.
  •conflicting (adjective)
  • ambivalent.
  •confused (adjective)
  • bewildered.
  •dangerous (adjective)
  • hairy,
  • unsafe,
  • perilous.
  •different (adjective)
  • various.
  •disbelieving (adjective)
  • skeptical,
  • cynical,
  • unsure,
  • wary,
  • Distrusting,
  • disbelieving,
  • doubting.
  •doubtful, changeable (adjective)
  • questionable,
  • indeterminate,
  • unclear,
  • indistinct,
  • unreliable,
  • vacillating,
  • hesitant,
  • risky,
  • indefinite,
  • conjectural,
  • insecure,
  • unsettled,
  • undecided,
  • hazy,
  • unforeseeable,
  • speculative,
  • vague,
  • unsure,
  • precarious,
  • incalculable,
  • unresolved,
  • unconfirmed,
  • ambivalent,
  • inconstant,
  • ambiguous,
  • irregular,
  • undetermined,
  • chancy,
  • hanging by a thread,
  • wavering,
  • up in the air,
  • irresolute,
  • fitful,
  • on thin ice,
  • variable,
  • up for grabs,
  • iffy,
  • erratic,
  • unpredictable,
  • dubious,
  • unfixed.
  •equivocal (adjective)
  • vague,
  • ambivalent,
  • equivocal,
  • ambiguous,
  • misleading,
  • double-entendre.
  •fallible (adjective)
  • in question.
  •fearful (adjective)
  • apprehensive.
  •flickering (adjective)
  • flickering.
  •hairy (adjective)
  • scary.
  •irregular (adjective)
  • unmethodical,
  • spasmodic,
  • unsystematic,
  • irregular,
  • nonuniform,
  • unpunctual.
  •irresolute (adjective)
  • tentative,
  • irresolute,
  • ambivalent,
  • shifty,
  • indecisive,
  • double-minded,
  • spineless,
  • Shilly-shally,
  • infirm,
  • vacillating,
  • unresolved,
  • halfhearted,
  • fickle,
  • inconsistent,
  • weak-kneed,
  • capricious,
  • shrinking,
  • irresponsible,
  • Flitting,
  • impulsive,
  • yellow,
  • undecided,
  • dillydallying,
  • undependable,
  • hesitant,
  • insipid,
  • changeable,
  • Half-hearted,
  • unsure,
  • volatile,
  • fly-by-night,
  • unwilling,
  • watery,
  • weak,
  • shy,
  • erratic,
  • wishy-washy.
  •loose (adjective)
  • adrift.
  •obscure (adjective)
  • puzzling.
  •opaque (adjective)
  • opaque,
  • Amphibological.
  •provisory (adjective)
  • provisory.
  •puzzled (adjective)
  • Stumped.
  •queasy (adjective)
  • fidgety.
  •rocky (adjective)
  • rickety.
  •rough (adjective)
  • approximate.
  •self-conscious (adjective)
  • self-conscious.
  •shaky (adjective)
  • shaky,
  • unsupported.
  •spasmodic (adjective)
  • spastic.
  •temperamental (adjective)
  • temperamental.
  •tottery (adjective)
  • tottery.
  •unanswered (adjective)
  • in doubt.
  •uncertain (adjective)
  • controversial,
  • arguable,
  • moot,
  • changeable,
  • confused,
  • contestable,
  • debatable,
  • unconvinced,
  • vague,
  • questionable,
  • deniable,
  • tentative,
  • precarious,
  • undecided,
  • intangible,
  • disputable,
  • mysterious,
  • insecure,
  • ambivalent,
  • unsure.
  •unforeseeable (adjective)
  • unknowable.
  •unpredictable (adjective)
  • unforeseeable.
  •unsubstantiated (adjective)
  • hard to believe.
  •up in the air (adjective)
  • inconclusive.

• n.

  •
  • bewildered,
  • casual,
  • alterable,
  • questioning,
  • problematic,
  • hypothetical,
  • undetermined,
  • possible,
  • conjectural,
  • sceptical,
  • unpredictable,
  • improbable.
  •
  • hidden,
  • borderline,
  • unclear,
  • problematical,
  • strange,
  • clouded,
  • dubitable.
  •
  • ill at ease,
  • exceptionable,
  • Mootable,
  • contested,
  • lost.
  •
  • cloudy,
  • nebulous,
  • inexplicit.
  •
  • fishy,
  • suspect,
  • shady.
  •
  • open.
  •
  • variant,
  • inconstant,
  • unstable,
  • fluid,
  • unsteady,
  • various.
  •
  • mercurial,
  • fantastic,
  • whimsical,
  • temperamental,
  • ticklish,
  • fantastical,
  • freakish.
  •uncertain (noun)
  • iffy,
  • groping,
  • indefinite,
  • hesitant,
  • unsealed,
  • unreliable,
  • contingent,
  • unsure,
  • flukey,
  • fluky,
  • unsafe,
  • doubtful,
  • insecure,
  • dubious,
  • up in the air,
  • undependable,
  • chancy,
  • unsettled,
  • incertain,
  • variable,
  • ambiguous,
  • ambivalent,
  • changeable.

• v.

  •confused (verb)
  • bewildered,
  • muddled.
  •supposed (verb)
  • hypothetical.

• Other synonyms:

  •
  • unsuspected,
  • dubitable,
  • dangerous,
  • undetermined,
  • contested,
  • introverted,
  • strange,
  • alterable,
  • unknowable,
  • clouded,
  • questioning,
  • unforeseeable,
  • fallible,
  • undisclosed,
  • indeterminable,
  • unclear,
  • unexplained,
  • unexplored,
  • unfamiliar,
  • unheard,
  • problematical,
  • unanswered,
  • unremarked,
  • Mootable,
  • unrecorded,
  • unidentified,
  • undiscovered,
  • irregular,
  • demure,
  • unspecified,
  • unacknowledged,
  • inconceivable,
  • inexplicit.
  •
  • nebulous,
  • inconstant,
  • hidden,
  • awkwardly,
  • unheralded,
  • inferior,
  • nameless,
  • unsolved,
  • unpredictable,
  • exceptionable,
  • arbitrary,
  • invisible,
  • fishy,
  • mercurial,
  • shaky.
  •
  • whimsical,
  • temperamental,
  • unmarked,
  • fantastical,
  • variant,
  • wobbly.
  •
  • freakish,
  • mystery,
  • ticklish,
  • shady,
  • fluid,
  • lost,
  • modest,
  • cloudy.
  •
  • awkward,
  • open,
  • fantastic.
  •
  • dark.
  •changeful
  • changing.
  •disinclined
  • reluctant.
  •doubtful
  • doubtful,
  • hesitating.
  •formless
  • shapeless.
  •glassy
  • slippery.
  •hesitant
  • halting.
  •indefinite
  • indefinite.
  •in dispute
  • issue.
  •indistinct
  • unrecognizable.
  •marginal
  • borderline.
  •polemical
  • polemic.
  •problematical
  • problematic.
  •puzzled
  • Stumped.
  •risky
  • touch-and-go.
  •shaky
  • rocky.
  •theoretical
  • conjectural.
  •unpredictable
  • incalculable.
  •unproven
  • unverified.
  •unsure
  • self-conscious.
  •vague
  • obscure.
  •Other relevant words:
  • pose,
  • inflammable,
  • upset,
  • ignorance,
  • general,
  • unsubstantiated,
  • disloyal,
  • hairy,
  • scary,
  • wobbly,
  • disoriented,
  • fantastical,
  • up for grabs,
  • mazy,
  • baffling,
  • bewail,
  • in question,
  • perplexing,
  • modest,
  • afraid,
  • ugly,
  • unverified,
  • spastic,
  • deviate,
  • dickey,
  • complex,
  • broken,
  • sticky,
  • fluid,
  • edgy,
  • sporadic,
  • dj,
  • snatchy,
  • tricky,
  • impartial,
  • hesitation,
  • problematical,
  • unsystematized,
  • grave,
  • undiscovered,
  • invertebrate,
  • fraught,
  • unpunctual,
  • unrecorded,
  • contingent,
  • hairbreadth,
  • frail,
  • faithless,
  • mind,
  • doubted,
  • questioning,
  • unnerved,
  • uneager,
  • sensitive,
  • enigmatic,
  • careful,
  • queasy,
  • oracular,
  • inconspicuous,
  • on the fence,
  • knotty,
  • hypothetical,
  • adrift,
  • shapeless,
  • waffling,
  • Immethodical,
  • blurry,
  • fitful,
  • demure,
  • scrupulous,
  • wishy-washy,
  • pale,
  • subjective,
  • in contention,
  • impetuous,
  • unbelieving,
  • possible,
  • Trustless,
  • unacknowledged,
  • unanswered,
  • dishonest,
  • arbitrary,
  • uncontrolled,
  • bleary,
  • ever-changing,
  • equivocation,
  • inexplicit,
  • Weak-minded,
  • Amphibological,
  • lost,
  • distracted,
  • filmy,
  • frivolous,
  • flickering,
  • freakish,
  • dubitable,
  • worrying,
  • varying,
  • disconnected,
  • contested,
  • diffident,
  • nerve-wracking,
  • dizzy,
  • torn,
  • Indemonstrable,
  • polemical,
  • cloudy,
  • imprecise,
  • coseismal,
  • unsafe,
  • doubtful,
  • concerned,
  • low-profile,
  • hair-raising,
  • indecision,
  • Controvertible,
  • Unapt,
  • deceive,
  • neutral,
  • dark,
  • unprovable,
  • hazy,
  • whimsical,
  • tottery,
  • dithering,
  • unproved,
  • devious,
  • unbiased,
  • unbelievable,
  • incomprehensible,
  • addle the wits,
  • Vicissitudinous,
  • lose,
  • roam,
  • nervous,
  • unfixed,
  • proposed,
  • blindfold,
  • independent,
  • unsubstantial,
  • unrhythmical,
  • slippery,
  • blear,
  • confutative,
  • agitated,
  • spasmodic,
  • in the balance,
  • hoodwink,
  • restricted,
  • foggy,
  • apprehensive,
  • all at sea,
  • untrustworthy,
  • confuse,
  • qualified,
  • touch-and-go,
  • wander,
  • indeterminateness,
  • incredible,
  • unsettled,
  • incertain,
  • unidentified,
  • bent,
  • introverted,
  • indeterminable,
  • incorrect,
  • rough,
  • Mootable,
  • labile,
  • eccentric,
  • chequered,
  • unstable,
  • Doubtable,
  • changing,
  • gallivant,
  • faint,
  • critical,
  • chancy,
  • undecipherable,
  • err,
  • Vicissitudinary,
  • hesitating,
  • frightening,
  • ambiguity,
  • distressed,
  • cautious,
  • iffy,
  • worried,
  • not kosher,
  • Unsteadfast,
  • touchy,
  • sheepish,
  • on edge,
  • swerve,
  • unassured,
  • inferior,
  • clouded,
  • embarrass,
  • lurching,
  • hanging by a thread,
  • scrappy,
  • Heteroclite,
  • snobbish,
  • indeterminacy,
  • incalculable,
  • close,
  • moody,
  • undisciplined,
  • inconclusiveness,
  • uncertainty,
  • wavery,
  • problematic,
  • indefinite,
  • Undetermination,
  • flying,
  • inauthentic,
  • unexplained,
  • shuffling,
  • obscure,
  • explosive,
  • under consideration,
  • disputed,
  • shady,
  • changeful,
  • opaque,
  • Equivocatory,
  • unworthy of,
  • dangerous,
  • awkwardly,
  • mistrustful,
  • incredulous,
  • mercurial,
  • distortable,
  • at a loss,
  • puzzling,
  • rave,
  • unmarked,
  • dicky,
  • nebulous,
  • untrue,
  • distraught,
  • indetermination,
  • galloping,
  • Spasmatic,
  • pending,
  • inaccurate,
  • borderline,
  • wavy,
  • of two minds,
  • suspicious,
  • tottering,
  • rambling,
  • troublous,
  • delicate,
  • cynic,
  • unexplored,
  • self-conscious,
  • troubled,
  • unconfident,
  • unsound,
  • exceptionable,
  • unconvincing,
  • suspension,
  • halting,
  • unsupported,
  • anxiety,
  • vulnerable,
  • unfamiliar,
  • grieve,
  • uncertainly,
  • unspecific,
  • chary,
  • at issue,
  • polemic,
  • protean,
  • diversified,
  • be uncertain,
  • tremulous,
  • fidgety,
  • patchy,
  • ticklish,
  • shaky,
  • shifting,
  • out of focus,
  • wonder,
  • fence,
  • Amphibolous,
  • rove,
  • pliant,
  • unforeseeable,
  • serious,
  • unclear,
  • discomfited,
  • approximate,
  • shot,
  • bamboozle,
  • variable,
  • Intermitting,
  • feeble,
  • dim,
  • fallible,
  • ill-defined,
  • untried,
  • undisclosed,
  • jumpy,
  • unequal,
  • non-partisan,
  • issue,
  • miss,
  • render uncertain,
  • deplore,
  • weak-kneed,
  • fretful,
  • unworthy,
  • untrusting,
  • impossible,
  • ill at ease,
  • indistinct,
  • anybody's guess,
  • tergiversating,
  • unscrupulous,
  • scatterbrained,
  • Undemonstrable,
  • crooked,
  • unverifiable,
  • bother,
  • nonuniform,
  • deviative,
  • chameleon-like,
  • unformed,
  • Unreasoned,
  • waver,
  • unascertainable,
  • dishonourable,
  • anticipation,
  • aleatory,
  • noncommittal,
  • expectancy,
  • measureless,
  • anxious,
  • susceptible,
  • Sub Judice,
  • havering,
  • wobbling,
  • indecisiveness,
  • flexible,
  • perturbed,
  • confound,
  • severe,
  • distrustful,
  • inconceivable,
  • uneven,
  • dicey,
  • Bleared,
  • unintelligible,
  • discontinuous,
  • amorphous,
  • unreliable,
  • unspecified,
  • non-specific,
  • intermittent,
  • mobile,
  • indistinguishable,
  • Teetering,
  • sceptical,
  • demur,
  • casual,
  • veering,
  • indeterminate,
  • polysemantic,
  • disreputable,
  • strange,
  • disquieted,
  • Contradictable,
  • untested,
  • improbable,
  • unmethodical,
  • unhealthy,
  • rickety,
  • delphic,
  • waffle,
  • mystify,
  • vagueness,
  • flimsy,
  • chanceful,
  • fluctuating,
  • Stumped,
  • variant,
  • in doubt,
  • ill,
  • underhand,
  • unpredictable,
  • undetermined,
  • suspense,
  • conditional,
  • incomputable,
  • undefined,
  • unaligned,
  • puzzled,
  • bewilder,
  • flukey,
  • unremarked,
  • unaccountable,
  • Rhapsodical,
  • guttering,
  • Suspecting,
  • haggard,
  • falter,
  • choppy,
  • uneasy,
  • dodgy,
  • unknowable,
  • chatoyant,
  • tense,
  • groping,
  • wavering,
  • unsuspected,
  • mystifying,
  • reluctant,
  • polysemous,
  • staggering,
  • puzzle,
  • fraught with danger,
  • unrestrained,
  • open to doubt,
  • iridescent,
  • uncomfortable,
  • blurred,
  • fishy,
  • disconcerted,
  • unrecognizable,
  • open,
  • perplex,
  • lubricious,
  • seismic,
  • timid,
  • variegated,
  • wandering,
  • uncountable,
  • unsolved,
  • disturbed,
  • wild,
  • roving,
  • unheard,
  • dependent,
  • quibble,
  • walk,
  • misty,
  • Careening,
  • digress,
  • mistrusting,
  • unauthenticated,
  • suspect,
  • confusing,
  • fearful,
  • Unstaid,
  • inconsequence,
  • out of it,
  • Half-hearted,
  • hidden,
  • charged,
  • solicitous,
  • give it up,
  • spotty,
  • lukewarm,
  • refutable,
  • awkward,
  • unprejudiced,
  • upsetting,
  • inexact,
  • chameleonic,
  • conjectural,
  • muddled,
  • afloat,
  • watchful,
  • molder,
  • tenebrous,
  • herky-jerky,
  • Chancey,
  • difficult,
  • parlous,
  • downbeat,
  • shadowy,
  • nasty,
  • namby-pamby,
  • confusable,
  • hard to believe,
  • undeserving,
  • serendipitous,
  • doubt,
  • alternating,
  • rocky,
  • mutable,
  • unsystematic,
  • put out,
  • catchy,
  • unsealed,
  • mystery,
  • alterable,
  • hesitate,
  • complicated,
  • jerky,
  • uncertainity,
  • enigmatical,
  • unpersuaded,
  • invisible,
  • giddy,
  • Multivocal,
  • non-aligned,
  • vacillate,
  • irregular,
  • thorny,
  • drivel,
  • on thin ice,
  • ironic,
  • vagabond,
  • dote,
  • able,
  • fantastic,
  • in dispute,
  • depressed,
  • at loose ends,
  • at sea,
  • treacherous,
  • agnostic,
  • unproven,
  • provisory,
  • fluctuate,
  • wanton,
  • nerve-racking,
  • bemoan,
  • flighty,
  • Questioned,
  • plastic,
  • cryptic,
  • in a fog,
  • open to question,
  • temperamental,
  • shilly-shallying,
  • formless,
  • indefiniteness,
  • intangible,
  • bewildered,
  • wayward,
  • desultory,
  • unethical,
  • vagrant,
  • restless,
  • leery,
  • faltering,
  • unapparent,
  • disorderly,
  • unfaithful,
  • up in the air,
  • various,
  • unheralded,
  • fuzzy,
  • inconstant,
  • under discussion,
  • foreign,
  • disorientated,
  • adjustable,
  • unconfirmed,
  • perilous,
  • linger,
  • irrational,
  • blind,
  • fence-straddling,
  • tenuous,
  • undeterminable,
  • fanciful,
  • dubious,
  • ramble,
  • Striated,
  • nameless,
  • reduced,
  • false,
  • mourn,
  • unsteady,
  • uncommitted,
  • fence-sitting,
  • terrifying.

Antonyms for Uncertain:

• adj.

  • all
    certain.
  • doubtful, changeable
    resolved, decided, reliable, secure, clear, settled, definite, determined, sure, undoubted, certain, trustworthy, safe, unchanging, predictable, foreseeable.
  • Other antonyms:
    obvious, in for, decisive, sure as shooting, distinct, foreordained, true, bound, unequivocal, immutable, abiding, stable, predictable, uniform, self-assured, plain, doomed, unquestionable, invariable, tried, indubitable, convinced, predestined, tried and true, unchangeable, manifest, steady, even, assured, sanguine, trusty, fated, changeless, unquestioned, destined, lasting, equable, dependable, lucid, durable, sealed, stationary, permanent, persistent, perspicuous, indisputable, predestinate, evident, constant.