UNUTTERABLE Meaning of UNUTTERABLE in English un ‧ ut ‧ ter ‧ a ‧ ble /ʌnˈʌt ə rəb ə l/ BrE AmE adjective literary an unutterable feeling is too extreme to be expressed in words —unutterably adverb Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012