The term 'Babbles On' can be summarized by the crossword solution 'YAKS, ' which is a four-letter word. YAKS are large, long-haired, domesticated animals that are native to the Himalayan region of South Asia. They are often used as pack animals and for their milk, meat, and hides. YAKS are also known for their loud, low-pitched vocalizations, which is why they are an apt metaphor for someone who babbles on.