"Tenebrous" comes from the Latin word for "darkness."
Something tenebrous is dark and gloomy.
Or, something tenebrous is figuratively dark and gloomy, meaning it's hard to understand because it seems hidden by darkness.
TEN ih bruss
Part of speech:
(Adjectives are describing words, like "large" or "late."
They can be used in two ways:
1. Right before a noun, as in "a tenebrous thing."
2. After a linking verb, as in "It was tenebrous.")
For the noun, use "tenebrousness" or "tenebrosity."
Some alternate forms of the adjective include "tenebrious" and "tenebrose," but since the form you see more often is "tenebrous," I suggest sticking to it.
How to use it:
This is a rare, scholarly word straight from Latin, so we use it to be formal, serious, or poetic.
Talk about tenebrous places, images, colors, shades, nights, skies, trees, waters, and so on. Or say that something has a tenebrous beauty or a tenebrous presence.
More figuratively, talk about tenebrous ideas, thoughts, philosophies, music, voices, moods and so on, or something's tenebrous depths, edges, corners, etc.
In the opening credits for each subsequent season of The Walking Dead, those scenes of ruin and decay grow increasingly tenebrous.