References in common literature ? I gave the heap a shove more than the lip in the entrance. Another moment there came up from down below a howl of rage. encroachment, intrusion, invasion - any entry into a location not Formerly occupied; "an invasion of travelers"; "an invasion of locusts" https://entrance-mats69022.verybigblog.com/36826131/an-unbiased-view-of-entrance-mats