Alright.

I'm trying to come up with other examples, but as the parent said, it then depends how pedantic we want to be e.g. take Poincaré's spacetime, but he'd still be working from two pre-existing ideas, "space" and "time"; the idea of combining the two is (feels?) quite novel and unexpected.

Going back some more, the notion of "space" (or that of "time") feels more primitive, less explainable in terms of other notions.