UNDEFINABLE

indefinable, undefinable

(adjective) not capable of being precisely or readily described; not easily put into words; “an indefinable feeling of terror”; “an abstract concept that seems indefinable”

Source: WordNet® 3.1

Etymology

Adjective

undefinable (comparative more undefinable, superlative most undefinable)

Not definable.

Synonyms

• indefinable (more common)

Noun

undefinable (plural undefinables)

Anything that cannot be defined.

Source: Wiktionary