/ ˈsɒnərəs; NAmE ˈsɑːn-; səˈnɔːrəs/ adjective
( formal ) having a pleasant full deep sound :
a sonorous voice
► son·or·ity / səˈnɒrəti; NAmE -ˈnɔːr-; -ˈnɑːr-/ noun [ U , C ]:
the rich sonority of the bass
► son·or·ous·ly adverb
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WORD ORIGIN
early 17th cent.: from Latin sonorus (from sonor sound) + -ous .