Loquaciousness – loquacity (talkativeness; the habit or practice of talking continually or excessively)
“Mr Pope and Mr Cushing rose from their chairs every time Elsie, Rosfrith or I entered, and competed to help or pay the nicest compliments. Their loquaciousness was an irritation to almost everyone except Da, who rewarded their attentions to me with small smiles and nods. Dr Murray was not so encouraging.
“Gentlemen, the more words you employ to flatter the ladies the fewer you define. Your constant use of the English language is, in fact, doing it a disservice.” They quickly turned to their work.”
The Dictionary of Lost Words, Pip Williams