Lurkiness

The natural solitariness and asperity of a spot, the immobility and lurkiness of the lake, the extreme denseness of the foliage, together with the almost cavernous gloom which such a concurrence of causes produced, were seen in awful contrast [...]

I've been trying to remember the instructor's full name ever since the tutoring session. I remembered his first name, Paul, but that's all that was coming to mind when he was hovering over me with his hot-ass breath and...I don't know...lurkiness?