sonorously

sonorous +‎ -ly

sonorously (comparative more sonorously, superlative most sonorously)

1. In a sonorous way.
   • 1907, Barbara Baynton, edited by Sally Krimmer and Alan Lawson, Human Toll (Portable Australian Authors: Barbara Baynton), St Lucia: University of Queensland Press, published 1980, page 241:

     Now old Falkenmeyer's fiddle feelingly quavered a few notes, then sonorously heralded the preliminary bass of the first set. Daddy Stein, standing in the middle of the room, clapped his hands for attention.

   • 2018, Anne Perkins, “A Dad’s Army-style Brexit looms. ‘Don’t panic!’”, in Guardian‎:

     Cox’s thing is defending flimsy cases, and as he strode round the platform declaiming sonorously, like Rumpole on a particularly outrageous brief, it was easy to see why they pay him so well.