gibber - definition and synonyms

verb [intransitive/transitive] 

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/ˈdʒɪbə(r)/
present tense
I/you/we/theygibber
he/she/itgibbers
present participlegibbering
past tensegibbered
past participlegibbered
  1. to speak in a way that is hard to understand because you are ill, cold, or frightened