Twaddle

Meaning foolish or idle chatter dates from the late 18th century. It derives from earlier and now archaic words like twattle and twittle where a twattle-basket, for example, meant a chatterbox. The OED informs us that this whole group of words like tittle-tattle, which was earlier written as twittle-twattle, are all onomatopoeic or echoic in origin.