mysterious
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(s) of an obscure nature
- the new insurance policy is written without cryptic or mysterious terms
- a deep dark secret
- the inscrutable workings of Providence
- "in its mysterious past it encompasses all the dim origins of life"- Rachel Carson
- rituals totally mystifying to visitors from other lands
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(s) having an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding
- mysterious symbols
- the mystical style of Blake
- occult lore
- the secret learning of the ancients