Artificial intelligent assistant

inexpressible

inexpressible
/ˌɪnɪkˈspresəbl; ˌɪnɪk`sprɛsəbl/ adj
too great to be expressed in words 无法用言语表达的
    inexpressible sorrow, anguish, joy, etc 难以形容的悲哀、 痛苦、 喜悦等.

牛津英汉双解词典

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