torrentially; swiftly flowing (water, esp. river); voluminously flowing
(speak) eloquently; fluently; spout forth (a torrent of speech)
flood of the times (moving strongly in one direction); current of the times
到頭、彼は諦めたようだ。
In the end, he seemed to have given up.
彼はとうとうと意見を話し続けた。
He spoke on and on fluently.
待っていた電車がとうとう来ましたね。
You finally came.