ingress

It is true that sometimes they have to provide means to prevent the ingress of too much water; but this is very easily done.

Two doorways, one on each of the faces which looked into the enclosure, offered ingress.

But Renwick was not sure that there was no other means of ingress.

Into this opens all their dwellings, the door being far below the surface, so that free ingress and egress are secured.

Then a peculiar knock was given on a particular door, which at once promptly opened to give them ingress.