Ineffable

прилагательное невыразимый, несказанный, неописуемый Синоним(ы): inexpressible, indescribable, unspeakable, unutterable

Большой англо-русский словарь

Ineffable

adjective Etymology: Middle English, from Latin ineffabilis, from in- + effabilis capable of being expressed, from effari to speak out, from ex- + fari to speak — more at ban 1. a. incapable of being expressed in words; indescribable Example: ineffable joy b. unspeakable Example: ineffable disgust 2. not to be uttered; taboo Example: the ineffable name of Jehovahineffability nounineffableness nounineffably adverb

Merriam-Webster's Collegiate Dictionary