be as quiet as a mouse

to be very quiet She was as quiet as a mouse. I didn't even know she'd come in.

Name	Pronounced	Usage
Eris	-	Greek Mythology
Thiemo	-	German, Dutch, Ancient Germanic
Magni	-	Ancient Scandinavian, Norse Mythology
Neves	-	Portuguese
Zvjezdana	ZVYEZ-dah-nah	Croatian
Aella	-	Greek Mythology