adj. 25B6; adjective INEXPRESSIBLE, indefinable, beyond words/description, incommunicable, ineffable; unutterable, unspeakable; intense, extreme, acute, strong, powerful, profound; incredible, extraordinary, remarkable, prodigious.
INDESCRIBABLE
Meaning of INDESCRIBABLE in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012