the sound of many people speaking at the same time 嘈杂的人声 a babble of voices 人声嘈杂
talking that is confused or silly and is difficult to understand 含混不清的话；胡言乱语 the sounds a baby makes before beginning to say actual words （幼儿）咿呀学语声 see also psychobabble
Word OriginMiddle English: from Middle Low German babbelen, or an independent English formation, as a frequentative based on the repeated syllable ba, typical of a child's early speech.