volubility

1. She spoke with a volubility I never suspected she had in her.
   她说起话来那样滔滔不绝，是我从来未怀疑过的。
2. George rattled on with a volubility which surprised himself.
   乔治滔滔不绝地说话，连他自己听了也觉得诧异。

noun

1. the quality of being facile in speech and writing

   Synonym:    fluencyarticulateness