Idly Chattering, Like a Brook

This page is the CodyCross answer for the clue below from La Bella Roma, Group 403, Puzzle 2 (Villa Borghese).

Question is: Idly Chattering, Like a Brook

and the answer is: BABBLING

Word Meaning:

BABBLING — (uncountable) a stage in child language acquisition, during which an infant appears to be experimenting with uttering sounds of language, but not yet producing any recognizable words

Definitions from Wiktionary.