Continuity
Between any two points on a continuous function, there exists a path. No gaps, no jumps, no sudden departures from the trajectory. The curve knows where it has been and where it is going. This is the fundamental promise of continuity: the guarantee that small changes in input produce small changes in output.
The domain name itself is an axis -- continu.ax -- a coordinate system for continuous thought. Every scroll reveals more of the curve, more of the story, more of the unbroken line that connects origin to infinity.