The story
- Proto-Germanic*gabbōną
- Proto-West Germanic*gabbōn
- Old Englishgabban
- Middle Englishgabben
- Englishgab
- English todaygabble
From gab + -le. Cognate with Saterland Frisian gabbelje (“to mock”), Dutch gabbelen (“to chatter, babble”), German Low German gabbeln (“to mock”).
Etymology from Wiktionary, CC BY-SA 4.0.