Insouciant - free from concern, worry, or anxiety. Origin Insouciant entered English from French, based on the French verb soucier meaning "to worry." Ultimately it finds its roots in the Latin sollicitāre meaning "to disturb.
to talk excessively and pointlessly; babble: They prated on until I was ready to scream . to utter in empty or foolish talk: to prate absurdities with the greatest seriousness . noun: act of prating. empty or foolish talk.