babble

Concise Oxford English Dictionary © 2008 Oxford University Press:
babble/ˈbabl/

▶verb

• 1 talk rapidly and continuously in a foolish, excited, or incomprehensible way.

  ■ reveal something secret.

• 2 (usu. as adj. babbling) (of a stream) make a continuous murmur as the water flows over stones.

▶noun the sound of babbling.

■ foolish, excited, or confused talk.

– derivatives
babblement noun.

– origin ME: from Mid. Low Ger. babbelen, or an independent Engl. formation, based on the repeated syllable ba, typical of a child's early speech.