نافدَ ينافد، مُنافدةً، فهو مُنافِد، والمفعول مُنافَد

حاكَمه وخاصَمه ليقطع حجَّتَه ويفنِّدها

🇬🇧 Translation:

to debate and contend with his adversary to refute and disprove his argument