abstruse

As adjectives the difference between perplexing and abstruse

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

As a verb perplexing

is .

Abstruse is a related term of indistinct.

As adjectives the difference between abstruse and indistinct

is that abstruse is (obsolete) concealed or hidden out of the way; secret while indistinct is (of an image etc) not clearly defined or not having a sharp outline; faint or dim.

Dark is a related term of abstruse.

As adjectives the difference between dark and abstruse

is that dark is having an absolute or (more often) relative lack of light while abstruse is (obsolete) concealed or hidden out of the way; secret .

As a noun dark

is a complete or (more often) partial absence of light.

Difficult is a synonym of abstruse.

As adjectives the difference between abstruse and difficult

is that abstruse is concealed or hidden out of the way; secret while difficult is hard, not easy, requiring much effort.

As a verb difficult is

to make difficult; to impede; to perplex.

Misty is a related term of abstruse.

As a proper noun misty

is from the adjective "misty", reasonably popular in the 1970s and the 1980s.

As an adjective abstruse is

(obsolete) concealed or hidden out of the way; secret .

Inexplicable is a synonym of abstruse.

As adjectives the difference between inexplicable and abstruse

is that inexplicable is impossible to explain; not easily accounted for while abstruse is (obsolete) concealed or hidden out of the way; secret .

As adjectives the difference between generalised and abstruse

is that generalised is an alternative spelling of lang=en while abstruse is concealed or hidden out of the way; secret.

As a verb generalised

is past tense of generalise.

Abstruse is a related term of occult.

As adjectives the difference between abstruse and occult

is that abstruse is (obsolete) concealed or hidden out of the way; secret while occult is (lb) secret; hidden from general knowledge; undetected.

As a verb occult is

(astronomy) to cover or hide from view.

As a noun occult is

supernatural affairs.

As adjectives the difference between abstruse and straightforward

is that abstruse is (obsolete) concealed or hidden out of the way; secret while straightforward is proceeding in a straight course or manner; not deviating; honest; frank.

As an adverb straightforward is

in a straightforward manner.

General is a related term of abstruse.

As a noun general

is general.

As an adjective abstruse is

(obsolete) concealed or hidden out of the way; secret .