خَصَمَ: حَسَمَ، اِقْتَطَعَ to discount, deduct, rebate, take off, subtract

خَصَمَ كِمْبِيالَةً إِلَخ to discount ( a bill, etc.), note

خَصَمَ: غَلَبَ to overcome, beat, defeat, triumph over