Tenebrous

Used in a sentence:

• The hallway with the shades drawn shut and the candles blown out was tenebrous, making her almost turn back to find comfort in the smoldering embers of the fireplace in her room.

Source: Wiktionary

Commentary:

Now here’s a new word for me. I’ve never heard of tenebrous but it seems an excellent word. Of course in countries where electric lights are all but too common, there is lack of situations for the literal meaning of this word but metaphorically I could see someone finding the Las Vegas strip tenebrous, couldn’t you?