'babbly' originates from English, specifically the verb 'babble', where the imitative root 'bab-' represented repeated or meaningless syllables (a sound-symbolic element for incoherent talk) and the suffix '-y' forms an adjective meaning 'full of'.

'babbly' changed from Middle English forms like 'babblen' or 'babelen' (and the later modern English verb 'babble') and was formed as an adjective by adding the suffix '-y' to produce 'babbly'.

Initially, 'babble' meant 'to make meaningless sounds or chatter'; over time the derived adjective 'babbly' came to mean 'characterized by such meaningless or excessive talk'.