IPA: /mɛˈloʊdiəsnəs/
KK: /mɛˈloʊdiəsnəs/
The quality of having a pleasant and musical sound.
The melodiousness of the song made everyone feel happy.
Melodiousness → It is formed from "melodious" (from Greek "melodía", meaning song or tune) and the suffix "-ness" (meaning the state or quality of). The word "melodiousness" refers to the quality of being melodious or having a pleasant sound.
Think of 'melody' as a beautiful song, and remember that 'melodiousness' means the quality of having a beautiful sound.