tenebrous

/ˈtɛnəbrəs/
adjective
  1. Dark, shadowy, or gloomy.
    • The tenebrous forest was so dark that we needed flashlights at noon.
    • A tenebrous mood fell over the room when the power went out.
    • The old castle had a tenebrous atmosphere that made visitors uneasy.
  2. Difficult to understand; obscure or mysterious.
    • The instructions were so tenebrous that nobody could follow them.
    • His tenebrous writing style makes his poetry hard to interpret.
    • The professor's tenebrous lecture left the students confused.
Antonyms
What does "tenebrous" mean? | whatsthatwordmean | whatsthatwordmean