loquacious [ləˈkweɪʃəs]

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adj.多嘴的，饶舌的

describes someone who talks a lot

The normally loquacious Mr O'Reilly has said little. 平常话多的奥赖利先生几乎没说什么。
Kennedy had become almost as loquacious as Joe. 肯尼迪变得和乔一样唠叨了。