indescribable

As a noun dictionary

is a reference work with a list of words from one or more languages, normally ordered alphabetically and explaining each word's meaning and sometimes containing information on its etymology, usage, translations and other data.

As a verb dictionary

is (label) to look up in a dictionary.

As an adjective indescribable is

impossible, or very difficult to describe.

As adjectives the difference between indescribable and undefined

is that indescribable is impossible, or very difficult to describe while undefined is lacking a definition or value.

As an adjective indescribable

is impossible, or very difficult to describe.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As adjectives the difference between indescribable and inexpressable

is that indescribable is impossible, or very difficult to describe while inexpressable is not capable of being expressed.

As adjectives the difference between intangible and indescribable

is that intangible is incapable of being perceived by the senses; incorporeal while indescribable is impossible, or very difficult to describe.

As a noun intangible

is anything intangible.

As adjectives the difference between indescribable and inexplicable

is that indescribable is impossible, or very difficult to describe while inexplicable is impossible to explain; not easily accounted for.

As adjectives the difference between indescribable and nameless

is that indescribable is impossible, or very difficult to describe while nameless is not having a name; unnamed.

Inexpressible is a synonym of indescribable.

As adjectives the difference between indescribable and inexpressible

is that indescribable is impossible, or very difficult to describe while inexpressible is unable to be expressed.

As adjectives the difference between nondescript and indescribable

is that nondescript is not described (in the academic literature); undescribed, unidentified while indescribable is impossible, or very difficult to describe.

As a noun nondescript

is an undistinguished, unexceptional person or thing.

As adjectives the difference between indescribable and indescribable

is that indescribable is impossible, or very difficult to describe while indescribable is impossible, or very difficult to describe.