His pride in having at any time of his life achieved such a great social distinction as to be a nuisance, an incumbrance, and a pest, was only to be satisfied by three sonorous repetitions of the boast.
There are no more uses of "sonorous" in the book.
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The candidate discussed weighty matters in rich, sonorous tones.
I prefer traditional sonorous chords to the dissonant chords with which she likes to experiment.