| Definition/Meaning | Word/Phrase |
| (archaic) roundabout or mysterious ways of action |
ambages
|
| mysterious and known to few |
arcane
,
esoteric
|
| (Greek mythology) a mysterious and terrifying deity of the underworld |
Demogorgon
|
| very mysterious |
eerie
|
| strangeness by virtue of being mysterious and inspiring fear |
eeriness
,
ghostliness
|
| mysterious, one who is |
enigma
|
| romance that deals with desolate and mysterious and grotesque events |
Gothic romance
|
| mysterious or supernatural |
numinous
|
| mysterious and supernatural |
occult
|
| exciting and mysterious quality (as of a heroic time or adventure) |
romance
,
romanticism
|
| sudden or mysterious disappearance |
vanishing
|