Synonyms and antonyms of Impossible to describe or explain in British Thesaurus

inexplicable (adjective)

impossible to explain

indefinable (adjective)

impossible to describe or explain clearly

indescribable (adjective)

impossible to describe because of being so extreme

unfathomable (adjective)

formal impossible to explain or understand

unaccountable (adjective)

formal difficult or impossible to explain or understand

nameless (adjective)

literary too difficult to describe

nebulous (adjective)

not developed or clear enough to describe