ق س سq-s-s
(ن) قَسَّ يَقُسُّ قَسًّاqassa yaqussu qassan: to search for something by night. (This verb is not used in the Quran.)
قِسِّيْسٌqissīs pl. قِسِّيْسُوْنَqissīsūna: one who seeks knowledge by night, i.e. a Christian scholar, priest. Only once in the Quran: ﴿ذٰلِكَ بِاَنَّ مِنْهُمْ قِسِّيْسِيْنَ وَرُهْبَانًا﴾ (Al-Māʾidah 5:82)