2 Metaphors for mutters

and then, as the object of her solicitude disappears among the trees, she draws a long sigh; a mutter is heard"some accident" are the only words distinguishable; a bang of the door follows, and the affectionate nurse iswhat?probably wiping her eyes in the passage.

The mutter became momentarily a deep-throated chuckle of malice.

2 Metaphors for  mutters