The phrase 'uncertainty to' is incorrect and not usable in written English.
Instead, you can use the phrase 'uncertainty about' to express the idea. For example: I feel a sense of uncertainty about my future.
That allowed fear and uncertainty to spread.
That would add both complexity and uncertainty to investment decisions.
Currency fluctuations already have added uncertainty to supply routes.
But they create too much uncertainty to make good law.
Greek politics continue to add uncertainty to the process.
Trump's election has added a new layer of uncertainty to all these potential flashpoints.
There is the injury, which has brought a measure of uncertainty to the Giants' preparations.
The 28-year-old has endured too much uncertainty to revel in glib assumptions.
Why add that level of uncertainty to an already dicey situation?
It's added even more uncertainty to the already stressful process of buying our first home".
But America's battle against terrorism has added more uncertainty to the outlook.
