IPA: /ˈvɒl.jə.bəl.nəs/
KK: /ˈvɑl.jə.bəl.nəs/
The quality of being able to speak easily and fluently.
Her volubleness made her a great speaker at the conference.
Volubleness → It is formed from "voluble" (from Latin "volubilis", meaning rolling or turning) and the suffix "-ness" (meaning the state or quality of). The word "volubleness" refers to the quality of being able to roll or turn, often used to describe someone who speaks fluently and easily.
Think of 'rolling' or 'turning' ('volubilis') to remember that 'volubleness' means the quality of speaking fluently and easily.