ن ب طn-b-ṭ
(ن، ض) نَبَطَ يَنْبُطُ وَيَنْبِطُ نَبْطًاnabaṭa yanbuṭu wa-yanbiṭu nabṭan: (of water) to gush out of something. (This verb is not used in the Quran.)
Form X (istifʿāl) اِسْتَنْبَطَ يَسْتَنْبِطُ اِسْتِنْبَاطًاistanbaṭa yastanbiṭu istinbāṭan: to bring out something hidden with effort and make it manifest, as one digs a well and brings out water; hence to discover the depth and reality of a matter by reflection and reasoning. Only once in the Quran: ﴿لَعَلِمَهُ الَّذِيْنَ يَسْتَنْۢبِطُوْنَهُۥ مِنْهُمْ﴾ (An-Nisāʾ 4:83)