/ ˈprætl; NAmE / verb
[ v ] prattle (on / away) (about sb/sth) ( old-fashioned , often disapproving ) to talk a lot about unimportant things :
She prattled on about her children all evening.
► prat·tle noun [ U ]
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WORD ORIGIN
mid 16th cent.: from Middle Low German pratelen , from praten , probably of imitative origin.