uncertainty
noun
uk/ʌnˈsɜːtənti/ us [ C or U ]
the feeling of not being sure what will happen in the future:
The rule changes are complicated and cause uncertainty for workers and headaches for employers.
At a time of economic uncertainty, risk taking can seem particularly difficult.
There are uncertainties that loom over commodities prices.
uncertainty about/over When there is uncertainty about financing, then private equity is not so quick to make deals.