unknown

As adjectives the difference between arcane and unknown

is that arcane is understood by only a few; obscure; requiring secret or mysterious knowledge while unknown is not known; unidentified; not well known.

As a noun unknown is

(algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

As nouns the difference between nothing and unknown

is that nothing is something trifling, or of no consequence or importance while unknown is a variable (usually x, y or z) whose value is to be found.

As a pronoun nothing

is not any thing; no thing.

As an adverb nothing

is not at all; in no way.

As an adjective unknown is

not known; unidentified; not well known.

As adjectives the difference between unaware and unknown

is that unaware is not aware or informed; lacking knowledge while unknown is not known; unidentified; not well known.

As a noun unknown is

a variable (usually x, y or z) whose value is to be found.

As adjectives the difference between ambiguous and unknown

is that ambiguous is open to multiple interpretations while unknown is not known; unidentified; not well known.

As a noun unknown is

a variable (usually x, y or z) whose value is to be found.

As adjectives the difference between unknown and unfamous

is that unknown is not known; unidentified; not well known while unfamous is not famous.

As a noun unknown

is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

As adjectives the difference between inexplicable and unknown

is that inexplicable is impossible to explain; not easily accounted for while unknown is not known; unidentified; not well known.

As a noun unknown is

(algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

Retired is a related term of unknown.

As adjectives the difference between retired and unknown

is that retired is secluded from society (of a lifestyle, activity etc); private, quiet while unknown is not known; unidentified; not well known.

As a verb retired

is (retire).

As a noun unknown is

(algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

In algebra|lang=en terms the difference between unknown and unknown

is that unknown is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found while unknown is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

As adjectives the difference between unknown and unknown

is that unknown is not known; unidentified; not well known while unknown is not known; unidentified; not well known.

As nouns the difference between unknown and unknown

is that unknown is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found while unknown is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

As adjectives the difference between unwitting and unknown

is that unwitting is unaware or uninformed while unknown is not known; unidentified; not well known.

As a noun unknown is

(algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.

Problematic is a synonym of unknown.

As adjectives the difference between problematic and unknown

is that problematic is posing a problem; difficult to overcome or solve while unknown is not known; unidentified; not well known.

As nouns the difference between problematic and unknown

is that problematic is (chiefly|in the plural) a problem or difficulty in a particular field of study while unknown is (algebra) a variable (usually x'', ''y'' or ''z ) whose value is to be found.