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babble [babbled, babbling, babbles]▼(to talk much)
verb
[UK: ˈbæb.l̩] [US: ˈbæb.l̩]

chatter [chattered, chattering, chatters]▼(talk idly)
verb
[UK: ˈtʃæ.tə(r)] [US: ˈtʃæ.tər]

gab [gabbed, gabbing, gabs]▼(to talk or chatter a lot, usually on trivial subjects)
verb
[UK: ɡæb] [US: ˈɡæb]

blab [blabbed, blabbing, blabs]▼(tell tales)
verb
[UK: blæb] [US: blæb]

blather [blathered, blathering, blathers]▼(to talk rapidly without making much sense)
verb
[UK: ˈblæ.ðə(r)] [US: ˈblæ.ðər]

prattle [prattled, prattling, prattles]▼(to talk incessantly; to babble)
verb
[UK: ˈpræt.l̩] [US: ˈpræt.l̩]

yap [yapped, yapping, yaps]▼(slang: to talk, especially excessively)
verb
[UK: jæp] [US: ˈjæp]

waffle [waffled, waffling, waffles]▼(to speak or write (something) at length without any clear aim or point, see also: ramble)
verb
[UK: ˈwɒf.l̩] [US: ˈwɑːf.l̩]