monotonous (adjective) monotonous: all the same, remaining the same
Sinonime: chattering, chatty,
effusive, garrulous,
glib, gossiping, gushing, jabbering, long-winded, loose-lipped, loquacious, mouthy, prattling,
prolix, talky,
verbose, voluble, windy,
wordyAntonime: close-mouthed, quiet,
secretive