murmur
noun
a low, continuous sound, as of a brook, the wind, or trees, or of low, indistinct voices.
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The people have been murmuring more than ever, and would, I believe, if led on by bold men, attempt to rescue the prisoners.
From The Golden Grasshopper A story of the days of Sir Thomas Gresham by William Henry Giles Kingston