This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Not known or established; questionable: domestic changes of great if uncertain consequences.

adj. Not determined; undecided: uncertain plans.

adj. Not having sure knowledge: an uncertain recollection of the sequence of events.

adj. Subject to change; variable: uncertain weather.

adj. Unsteady; fitful: uncertain light.

adj. not known for certain; questionable

adj. not yet determined; undecided

adj. variable and subject to change

adj. fitful or unsteady

adj. unpredictable or capricious

adj. Not certain; not having certain knowledge; not assured in mind; distrustful.

adj. Irresolute; inconsonant; variable; untrustworthy.

adj. Questionable; equivocal; indefinite; problematical.

adj. Not sure; liable to fall or err; fallible.

v. To make uncertain.

Not certain; doubtful.

Not known as regards quantity or extent; indefinite; problematical: as, an uncertain number of independent voters; a person of uncertain age.

Having doubts; without certain knowledge; not sure.

Not sure as to aim or effect desired.

Unreliable; insecure; not to be depended on.

Not firm or fixed; vague; indeterminate in nature; fluctuating.

Undecided; hesitating; not resolved.

Not steady; fitful.

Liable to change; fickle; inconstant; capricious; irresolute.

To make or cause to be uncertain.

adj. not established or confirmed

adj. not established beyond doubt; still undecided or unknown

adj. ambiguous (especially in the negative)

adj. subject to change

adj. not certain to occur; not inevitable

adj. not consistent or dependable

adj. lacking or indicating lack of confidence or assurance

"Analysts were reluctant to make predictions beyond one month because of what they described as an uncertain economic outlook given the central bank's ongoing efforts to tame inflation and as a string of interest-rate increases and other measures begin to bite."

up in the air    indefinite    ambiguous    variable    chancy    iffy    flukey    fluky    contingent    unreliable   

certain   

uncertainly    uncertainty   

precarious    distrustful    irresolute    inconsonant    variable    untrustworthy    questionable    equivocal    indefinite    problematical   

Burton    Merton    burton    certain    curtain   

vague    doubtful    weak    uneasy    difficult    sad    unsettle