References in classic literature ? I gave the heap a shove over the lip from the entrance. The next moment there came up from beneath a howl of rage. encroachment, intrusion, invasion - any entry into a region not Earlier occupied; "an invasion of travelers"; "an invasion of locusts" area, https://lorenzowogvi.wizzardsblog.com/37638551/not-known-factual-statements-about-entrance-mats