Knock

Knock, knock, who's there?

Pinch

Carapace

Noun - 1.The thick shell that covers the back of the turtle, the crab, and other animals. 2.Something likened to a shell that serves to protect or isolate from external influence.

Seraphically

-adjective of, like, or befitting a seraph (-noun a celestial being having three pairs of wings)

Intercolumnal

–noun Architecture.
1. the space between two adjacent columns, usually the clear space between the lower parts of the shafts.
2. the system of spacing between columns.

Gateway