Толковый словарь английского языка - whisper

I. verb (~ed; ~ing) see: whistle Date: before 12th century intransitive verb to speak softly with little or no vibration of the vocal cords especially to avoid being overheard, to make a sibilant sound that resembles ~ing, transitive verb to address in a ~, to utter or communicate in or as if in a ~, II. noun Date: 1595 something communicated by or as if by ~ing, 2. an act or instance of ~ing, a sibilant sound that resembles ~ed speech, hint, trace