What is to utter foolishly; to speak without reason or purpose; to chatter, or babble. What nonsense would the fool, thy master, prate, When thou, his knave, canst talk at such a rate ! Dryden called?

prate — To utter foolishly; to speak without reason or purpose; to chatter, or babble. What nonsense would the fool, thy master, prate, When thou, his knave, canst talk at such a rate ! Dryden. (Webster's 1913.)

Sources