whispering

(noun) a light noise, like the noise of silk clothing or leaves blowing in the wind. Synonyms: rustle, rustling, whisper.

(noun) speaking softly without vibration of the vocal cords. Synonyms: whisper, susurration, voicelessness.

(verb) speak softly; in a low voice. Synonyms: whisper.

(adj) making a low continuous indistinct sound. Synonyms: murmuring, susurrant. Examples: "Like murmuring waves." "Susurrant voices."