debacle
Concise Oxford English Dictionary © 2008 Oxford University Press:
debacle /deɪˈbɑːk(ə)l/
▶noun an utter failure or disaster.
– origin C19: from Fr. débâcle, from débâcler ‘unleash’, from dé- ‘un-’ + bâcler ‘to bar’ (from L. baculum ‘staff’).
'debacle' also found in these Oxford entries:

