Answer: gibber

AnswerCrossword Clue
GIBBERTalk foolishly.
GIBBERTalk incoherently.
GIBBERPrattle
GIBBERUnintelligible talking
GIBBERPrattle away
GIBBERSpeak foolishly
gibberto jabber (to talk rapidly)
gibberto speak unintelligibly
gibberto speak inarticulately or meaninglessly.