IPA: /səˈnɔːrəsli/
KK: /səˈnɔrəsli/
In a way that produces a deep, full, and rich sound.
The speaker delivered his speech sonorously, captivating the audience with his powerful voice.
Sonorously → It is formed from "sonorus" (from Latin, meaning full of sound or resonant) and the suffix "-ly" (meaning in a manner of). The word "sonorously" means in a manner that is full of sound or resonant.
Think of 'sonorus' which relates to sound, and remember that 'sonorously' describes something done in a full, resonant manner.