the world > movement > motion in a certain direction > going or coming in > [noun] > surreptitiously (3)
Creeping or stealing in, stealthy entrance.
Introduction or entrance by winding, indirect, or stealthy motion; creeping or slipping in covertly or stealthily; stealing in.
Subtle or unobserved entrance. Also: an instance of this; (in later use concrete) a secret or hidden entrance.