abysm

Hell; the infernal pit; the great deep; the primal chaos.

Orkney is an archipelago of 70 or so islands lying off the northeast tip of Scotland. “Everywhere in Orkney there is the sense of age, the dark backward and abysm,” the late Orcadian poet George Mackay Brown wrote. “The islands have been inhabited for a very long time, from before the day of the plough.”

An abyss; a gulf, a chasm, a very deep hole.

The abysm of hell.

Dr. Prunesquallor had circled around Steerpike with his head drawn back so that his cervical vertebrae rested against the near wall of his high collar, and a plumbless abysm yawned between his Adam’s apple and his pearl stud.