What does 'volubility' refer to?

'Volubility' refers to the quality of being facile in speech and writing, indicating fluency, ease, and a certain smoothness in verbal expression. A person who is characterized by volubility is often articulate and can express their thoughts eloquently and readily, making them an engaging speaker or writer. This term captures the notion of a flowing, uninterrupted manner of communicating, suggesting that ideas are conveyed with clarity and confidence.

The other options do not align with this definition. The quality of being quiet, for instance, implies a lack of speech or a reticent nature, which is the opposite of volubility. Abruptness in conversation indicates a style that lacks smoothness and continuity, which also contrasts with the characteristic of being fluent. Similarly, being seldom heard suggests infrequency in speech, further deviating from the positive connotation of ease and proficiency implied by volubility.