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HYPHEN
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WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
THESAURUS
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WORDNET DICTIONARY

Adjective uncertain has 7 senses

• uncertain(a = adj.all) incertain, unsure - lacking or indicating lack of confidence or assurance; "uncertain of his convictions"; "unsure of himself and his future"; "moving with uncertain (or unsure) steps"; "an uncertain smile"; "touched the ornaments with uncertain fingers"
Antonym: certain
Derived form noun uncertainness₁

• uncertain(a = adj.all) Array - not established beyond doubt; still undecided or unknown; "an uncertain future"; "a manuscript of uncertain origin"; "plans are still uncertain"; "changes of great if uncertain consequences"; "without further evidence his story must remain uncertain"
Antonym: certain
Derived form noun uncertainness₁

• uncertain(a = adj.all) unsealed - not established or confirmed; "his doom is as yet unsealed"
Derived form noun uncertainness₁

• uncertain(a = adj.all) Array - not certain to occur; not inevitable; "everything is uncertain about the army"; "the issue is uncertain"
Antonym: certain
Derived form noun uncertainness₁

• uncertain(s = adj.all) changeable, unsettled - subject to change; "a changeable climate"; "the weather is uncertain"; "unsettled weather with rain and hail and sunshine coming one right after the other"
• uncertain(s = adj.all) Array - not consistent or dependable; "an uncertain recollection of events"; "a gun with a rather uncertain trigger"
Derived form noun uncertainness₁

• uncertain(s = adj.all) Array - ambiguous (especially in the negative); "she spoke in no uncertain terms"

CIDE DICTIONARY

OXFORD DICTIONARY

THESAURUS

uncertain

Pyrrhonic, adrift, afloat, agnostic, alternating, ambiguous, ambitendent, ambivalent, amorphous, amphibological, amphibolous, at a loss, at loose ends, blear, bleared, bleary, blurred, blurry, broken, capricious, careening, catchy, chancy, changeable, changeful, choppy, confused, dark, desultory, deviable, deviative, dicey, dim, disconnected, discontinuous, distrustful, dizzy, double-minded, doubtful, doubting, dubious, eccentric, enigmatic, equivocal, equivocatory, erratic, faint, fast and loose, feeble, fence-sitting, fence-straddling, fickle, filmy, fitful, flickering, flighty, flitting, fluctuating, foggy, freakish, from Missouri, fuzzy, giddy, guttering, half-seen, half-visible, halting, hazardous, hazy, herky-jerky, hesitant, hesitating, heteroclite, iffy, ill-defined, immethodical, impetuous, impulsive, in doubt, incalculable, inconsistent, inconspicuous, inconstant, indecisive, indefinite, indemonstrable, indistinct, indistinguishable, infirm, infirm of purpose, insecure, intermittent, intermitting, ironic, irregular, irresolute, irresolved, irresponsible, jerky, leery, low-profile, lurching, mazy, mercurial, merely glimpsed, mistrustful, mistrusting, misty, moody, mugwumpian, mugwumpish, multivocal, mutable, mysterious, nonuniform, obscure, of two minds, out of focus, pale, patchy, polysemantic, polysemous, protean, questionable, questioning, rambling, restless, risky, rocky, rough, roving, scatterbrained, scrappy, scrupulous, semivisible, shadowy, shaky, shapeless, shifting, shifty, shuffling, shy, skeptical, snatchy, spasmatic, spasmic, spasmodic, spastic, speculative, spineless, sporadic, spotty, staggering, suspecting, suspicious, tottery, touch-and-go, treacherous, unaccountable, unclear, unconfirmable, uncontrolled, unconvinced, undecided, undefined, undependable, undetermined, undisciplined, undivinable, unequal, uneven, unfixed, unforeseeable, unhealthy, unmethodical, unmetrical, unpersuaded, unplain, unpredictable, unprovable, unrecognizable, unregular, unreliable, unresolved, unrestrained, unrhythmical, unsafe, unsettled, unsound, unstable, unstable as water, unstaid, unsteadfast, unsteady, unsure, unsystematic, untrusting, untrustworthy, unverifiable, vacillating, vagrant, vague, variable, veering, vicissitudinary, vicissitudinous, volatile, wandering, wanton, wary, wavering, wavery, wavy, wayward, weak, whimsical, wishy-washy, wobbling, wobbly

ROGET THESAURUS

uncertain

Irregularity of recurrence

N irregularity of recurrence, irregularity, uncertainty, unpunctuality, fitfulness, capriciousness, ecrhythmus, irregular, uncertain, unpunctual, capricious, desultory, fitful, flickering, rambling, rhapsodical, spasmodic, immethodical, unmethodical, variable, irregularly, by fits and starts.

Uncertainty

N uncertainty, incertitude, doubt, doubtfulness, dubiety, dubitation, dubitancy, dubitousness, hesitation, suspense, perplexity, embarrassment, dilemma, bewilderment, timidity, vacillation, diaporesis, indetermination, vagueness, haze, fog, obscurity, ambiguity, contingency, dependence, dependency, double contingency, possibility upon a possibility, open question, onus probandi, blind bargain, pig in a poke, leap in the dark, something or other, needle in a haystack, needle in a bottle of hay, roving commission, precariousness, fallibility, uncertain, casual, random, changeable, doubtful, dubious, indecisive, unsettled, undecided, undetermined, in suspense, open to discussion, controvertible, in question, vague, indeterminate, indefinite, ambiguous, equivocal, undefined, undefinable, confused, mystic, oracular, dazed, perplexing, enigmatic, paradoxical, apocryphal, problematical, hypothetical, experimental, unpredictable, unforeseeable (unknowable), fallible, questionable, precarious, slippery, ticklish, debatable, disputable, unreliable, untrustworthy, contingent, contingent on, dependent on, subject to, dependent on circumstances, occasional, provisional, unauthentic, unauthenticated, unauthoritative, unascertained, unconfirmed, undemonstrated, untold, uncounted, in a state of uncertainty, in a cloud, in a maze, bushed, off the track, ignorant, afraid to say, out of one's reckoning, astray, adrift, at sea, at fault, at a loss, at one's wit's end, at a nonplus, puzzled, lost, abroad, d_esorient_e, distracted, distraught, pendente lite, sub spe rati, Heaven knows, who can tell? who shall decide when doctors disagr.

For further exploring for "uncertain" in Webster Dictionary Online