ن ف عn-f-ʿ
(ف) نَفَعَ يَنْفَعُ نَفْعًاnafaʿa yanfaʿu nafʿan: to benefit — the opposite of ضَرّḍarr. ﴿يَوْمَ لَا يَنْفَعُ مَالٌ وَّلَا بَنُوْنَ﴾ (Ash-Shuʿarāʾ 26:88)
نَفْعٌnafʿ (verbal noun, maṣdar, also a noun, ism dhāt): benefit; in the Quran it is mostly paired with «ضَرّḍarr», and this pairing is one of the Quran's regular modes of expression. ﴿قُلْ لَّآ اَمْلِكُ لِنَفْسِيْ نَفْعًا وَّلَا ضَرًّا﴾ (Al-Aʿrāf 7:188)
مَنْفَعَةٌmanfaʿah pl. مَنَافِعُmanāfiʿu (mīmī verbal noun, maṣdar mīmī / noun, ism dhāt): a benefit, a useful thing. ﴿لَكُمْ فِيْهَا مَنَافِعُ اِلٰٓى اَجَلٍ مُّسَمًّي﴾ (Al-Ḥajj 22:33)
نَافِعٌnāfiʿ (active participle, ism fāʿil): one who benefits. (This word is not used in the Quran.)