gibber
Concise Oxford English Dictionary © 2008 Oxford University Press:
gibber1 /ˈdʒɪbə, ˈgɪbə/
▶verb speak rapidly and unintelligibly, typically through fear or shock.
– derivatives
gibbering adjective.
gibbering adjective.
– origin C17: imitative.
Concise Oxford English Dictionary © 2008 Oxford University Press:
gibber2 /ˈgɪbə/
▶noun Austral. a stone or boulder.
– origin from Dharuk giba ‘stone’.
'gibber' also found in these Oxford entries:

