Very orderly and methodical he looked, with a hand on each knee, and a loud watch ticking a sonorous sermon under his flapped waist-coat, as though it pitted its gravity and longevity against the levity and evanescence of the brisk fire.
There are no more uses of "sonorous" in the book.
Show samples from other sources
The candidate discussed weighty matters in rich, sonorous tones.
I prefer traditional sonorous chords to the dissonant chords with which she likes to experiment.