How do I explain what the Backrooms are, in simple words (Uncanny, Lonely, Liminal, etc.)
Just use words that seem related to the topic
Here are some that may be useful:
Eerie, sinister, unnatural, odd, abnormal;
Extraordinary, weird, mysterious, frightening;
Occult, incomprehensible, mystical, peculiar;
Enigmatic, fearsome, horrifying, puzzling;
Inexplicable, aberrant, anomalous, unique.
What do you think?