Translation

せせらぐ / ぶつぶつ言う / ゴボゴボ鳴る

Meaning

A continuous, low-pitched, bubbling sound often associated with flowing water or indistinct, rapid speech.

Examples

• The brook began to burble softly after the heavy spring rains.
  春の激しい雨の後、小川が静かにせせらぎ始めた。
• He continued to burble on about his day, though I had stopped listening minutes ago.
  彼は自分の今日あったことについてぶつぶつと話し続けたが、私は数分前にもう聞くのをやめていた。