Is anicca impermanence &/or uncertainty?

💚I've seen teachers translate anicca as uncertainty. Is that a good translation? I mean, you can be certain when something is going to end. I'm just kind of trying to put these translations together and see if any intellectual insights are known by anyone. What about anatta with impermanence &/or uncertainty? One minute I am thinking that they go together and the next I'm thinking that they don't go together. It seems hard to see. Why is it hard for me to see? Am I trying to see intellectually in order to see experientially? What about all of the 3 characteristics &/or uncertainty?