French bâcler

← Middle Dutch bakkelen (mention)

← Middle Dutch bakken (mention)

← Middle Dutch bakkelen (mention)

← Middle French bâcler (mention)

← Old French desbacler (cognate)

← Proto-Indo-European *bak- (derived)

← Latin baculum (mention)

→ English debacle (mention)

→ French débâcler (prefix)