uncertainty

Etymology

From Middle English uncerteynte; equivalent to un- + certainty or uncertain + -ty.

noun

1. (uncountable) Doubt; the condition of being uncertain or without conviction.
   After spending so much of the season looking upwards, the swashbuckling style and swagger of early season Spurs was replaced by uncertainty and frustration against a Norwich side who had the quality and verve to take advantage April 9, 2012, Mandeep Sanghera, “Tottenham 1-2 Norwich”, in BBC Sport
   Piecing together Corbynomics is difficult, not least because it has evolved during Mr Corbyn’s time in charge of Labour. The gulf between the Labour leadership’s past positions and the milder proposals in the manifesto means that enormous uncertainty hangs over what a Corbyn-led government would do in office. 17 May 2018, “Corbynomics would change Britain—but not in the way most people think”, in The Economist
2. (countable) Something uncertain or ambiguous.
3. (uncountable, mathematics) A parameter that measures the dispersion of a range of measured values.