Word family noun certainty ≠ uncertainty adjective certain ≠ uncertain adverb certainly ≠ uncertainly
From Longman Dictionary of Contemporary Englishuncertaintyun‧cer‧tain‧ty /ʌnˈsɜːtnti $ -ˈsɜːr-/ ●●○ noun (plural uncertainties) 1 [uncountable] when you feel doubt about what will happen Times of great change are also times of uncertainty.uncertainty about/as to There is a great deal of uncertainty about the company’s future.2 [countable usually plural] a situation which you are not sure about because you do not know what will happen life’s uncertaintiesuncertainty of the uncertainties of old ageExamples from the Corpus
uncertainty• With that she departed, leaving the young man full of ardor and decision, all his former uncertainty and hesitation gone.• In such a climate of unbalance, of moral uncertainty there is bound to come a period of esthetic drought.• There is a great deal of uncertainty about the future of the company.• Life is full of uncertainties and problems.• People live from day to day in a world full of uncertainties.• Fourth, the elimination of exchange rate uncertainty is likely to yield benefits in terms of higher growth rates of intra-union trade and investment.• Did his supportive family have to withstand the same uncertainty?• Future trends in marital status Future trends in marital status are subject to some uncertainty.• But the inmates could know nothing of the future, only the uncertainty of their terrible present.• Main reasons seem to be persistent low profitability among farmers and their uncertainty about the future.uncertainty about/as to• At that point, probabilities abound, and there is complete uncertainty as to what result that measurement will produce.• The second was the uncertainty as to the time the offender would spend in prison.From Longman Business Dictionaryuncertaintyun‧cer‧tain‧ty /ʌnˈsɜːtnti-ɜːr-/ noun [uncountable] a situation when what will happen in the future is likely to change, often in a way that is badExchange rate uncertainty is bound to reduce investment.uncertainty over/aboutThe announcement ends months of uncertainty over the contract’s future. 