Verbs

(v)maunderwander aimlessly
(v)mumble, mutter, maunder, mussitatetalk indistinctly; usually in a low voice
(v)chatter, piffle, palaver, prate, tittle-tattle, twaddle, clack, maunder, prattle, blab, gibber, tattle, blabber, gabblespeak (about unimportant matters) rapidly and incessantly