διαμάχη

Etymology: From Ancient Greek διαμάχη (diamákhē), from the prefix δια- (dia-, 'through, across, between') + μάχη (mákhē, 'battle, fight'). The prefix δια- indicates intensity or thoroughness, while μάχη is related to English words like 'machine' (originally a device for battle) and appears in terms like 'logomachy' (a dispute about words). The root is ultimately from Proto-Indo-European *magh- ('to fight, struggle').