Source : Webster's Revised Unabridged Dictionary (1913)

Remurmur \Re*mur"mur\ (r?-m?r"m?r), v. t. & i. [Pref. re- +
   murmur: cf. F. remurmurare.]
   To murmur again; to utter back, or reply, in murmurs.

         The trembling trees, in every plain and wood, Her fate
         remurmur to the silver flood.            --Pope.