indescribable
— Adjective
– English
～ defying expression or description; "indefinable yearnings"; "indescribable beauty"; "ineffable ecstasy"; "inexpressible anguish"; "unspeakable happiness"; "unutterable contempt"; "a thing of untellable splendor"
indescribably
— Adverb
– English
～ to an inexpressible degree; "she was looking very young tonight, and, as usual, indescribably beautiful, in a simple strapless dress of a green and white silky cotton"