The Collaborative International Dictionary
Clatteringly
Clatteringly \Clat"ter*ing*ly\, adv. With clattering.
Wiktionary
clatteringly
adv. With a clattering sound.
Usage examples of "clatteringly".
Bryson replied quickly as he unhooked the long shade and threw it, clatteringly, to the floor, then began working loose a bolt on the window frame.