"whispering" in the noun sense
1. rustle, rustling, whisper, whispering
a light noise, like the noise of silk clothing or leaves blowing in the wind
2. whisper, whispering, susurration, voicelessness
speaking softly without vibration of the vocal cords
"whispering" in the verb sense
1. whisper
speak softly in a low voice
"whispering" in the adjective sense
1. murmuring, susurrant, whispering
making a low continuous indistinct sound
"like murmuring waves"
"susurrant voices"
Source: WordNet® (An amazing lexical database of English)
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