'babble' originates from Middle English, specifically the word 'bablen', where the stem 'bab-' was imitative of meaningless or repetitive sounds.

'babble' changed from the Middle English word 'bablen' and eventually became the modern English word 'babble'. The adverb 'babblingly' is formed later by adding the participial/adjectival '-ing' plus the adverbial suffix '-ly'.

Initially, it meant 'to utter meaningless or repetitive sounds,' but over time it evolved into its current meanings of 'to speak rapidly and incoherently' and 'to make a continuous murmuring sound.'