whisper

Psst! When you speak very quietly, so that hardly anyone can hear, you're whispering, or speaking in a whisper.

A whisper is the opposite of a shout. When teachers talk about using your outside voice (when you're outside) and your inside voice (for speaking normally), the whisper is even quieter than the inside voice. This word can apply to other sounds too: you could say the wind is whispering. Whispers really do sound a lot like "Psst psst psst" to anyone who can't hear the exact words. You're likely to hear a lot of whispering in the library.

Definitions of whisper
1

n speaking softly without vibration of the vocal cords

Synonyms:
susurration, voicelessness, whispering
Types:
stage whisper
a loud whisper that can be overheard; on the stage it is heard by the audience but it supposed to be inaudible to the rest of the cast
Type of:
speaking, speech production
the utterance of intelligible speech

n a light noise, like the noise of silk clothing or leaves blowing in the wind

Synonyms:
rustle, rustling, whispering
Type of:
noise
sound of any kind (especially unintelligible or dissonant sound)

v speak softly; in a low voice

Antonyms:
shout
utter in a loud voice; talk in a loud voice (usually denoting characteristic manner of speaking)
Type of:
mouth, speak, talk, utter, verbalise, verbalize
express in speech

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