mysterious

As adjectives the difference between sibylline and mysterious

is that sibylline is of or pertaining to a sibyl or female oracle, especially the while mysterious is of unknown origin.

Difficult is a related term of mysterious.

As adjectives the difference between difficult and mysterious

is that difficult is hard, not easy, requiring much effort while mysterious is of unknown origin.

As a verb difficult

is (obsolete|transitive) to make difficult; to impede; to perplex.

As a noun miracle

is a wonderful event occurring in the physical world attributed to supernatural powers.

As an adjective mysterious is

of unknown origin.

Mysterious is a related term of humble.

As adjectives the difference between mysterious and humble

is that mysterious is of unknown origin while humble is near the ground; not high or lofty; not pretentious or magnificent; unpretending; unassuming; as, a humble cottage or humble can be hornless.

As a verb humble is

to bring low; to reduce the power, independence, or exaltation of; to lower; to abase; to humiliate.

Mysterious is a related term of tarnished.

As an adjective mysterious

is of unknown origin.

As a verb tarnished is

(tarnish).

As adjectives the difference between magical and mysterious

is that magical is of or relating to magic while mysterious is of unknown origin.

As a noun clear

is (scientology) an idea state of beingness free of unwanted influences.

As an adjective mysterious is

of unknown origin.

As adjectives the difference between mysterious and miraculous

is that mysterious is of unknown origin while miraculous is pertaining to miracles; referring to something that people can't explain.

As an adjective mysterious

is of unknown origin.

As an initialism odd is

oppositional defiant disorder.

As adjectives the difference between mysterious and marvelous

is that mysterious is of unknown origin while marvelous is (us) exciting wonder or surprise; astonishing; wonderful.