abstruse

Mysterious is a related term of abstruse.

As adjectives the difference between mysterious and abstruse

is that mysterious is of unknown origin while abstruse is (obsolete) concealed or hidden out of the way; secret .

Abstruse is a related term of ethereal.

As adjectives the difference between abstruse and ethereal

is that abstruse is (obsolete) concealed or hidden out of the way; secret while ethereal is pertaining to the hypothetical upper, purer air, or to the higher regions beyond the earth or beyond the atmosphere; celestial; otherworldly; as, ethereal space; ethereal regions.

Incomprehensible is a related term of abstruse.

As adjectives the difference between incomprehensible and abstruse

is that incomprehensible is incomprehensible while abstruse is (obsolete) concealed or hidden out of the way; secret .

As adjectives the difference between abstruse and erudite

is that abstruse is (obsolete) concealed or hidden out of the way; secret while erudite is .

Abstruse is a related term of symbolical.

As adjectives the difference between abstruse and symbolical

is that abstruse is (obsolete) concealed or hidden out of the way; secret while symbolical is of, related to, or being a symbol; symbolic.

Indefinite is a related term of abstruse.

As adjectives the difference between indefinite and abstruse

is that indefinite is without limit; forever, or until further notice; not definite while abstruse is (obsolete) concealed or hidden out of the way; secret .

As adjectives the difference between abstruse and enigmatic

is that abstruse is concealed or hidden out of the way; secret while enigmatic is pertaining to an enigma.

Abstruse is a related term of secretive.

As adjectives the difference between abstruse and secretive

is that abstruse is (obsolete) concealed or hidden out of the way; secret while secretive is having an inclination to secrecy.

Unknowable is a related term of abstruse.

As adjectives the difference between unknowable and abstruse

is that unknowable is not knowable while abstruse is (obsolete) concealed or hidden out of the way; secret .

As a noun unknowable

is something that cannot be known.

Mystic is a synonym of abstruse.

As adjectives the difference between mystic and abstruse

is that mystic is of, or relating to mystics, mysticism or occult mysteries; mystical while abstruse is (obsolete) concealed or hidden out of the way; secret .

As a noun mystic

is someone who practices mysticism.