(ض) وَهَنَ يَهِنُ وَهْنًاwahana yahinu wa-hnan (original form: وَهَنَ يَوْهِنُwahana yawhinu): (1) to be physically weak (2) (of resolve and courage) to weaken, to lose heart. ﴿رَبِّ اِنِّيْ وَهَنَ الْعَظْمُ مِنِّيْ﴾ (Maryam 19:4); ﴿وَلَا تَهِنُوْا وَلَا تَحْزَنُوْا﴾ (Āl ʿImrān 3:139)
وَهْنٌwahn (verbal noun (maṣdar), also a noun): weakness, hardship. ﴿حَمَلَتْهُ اُمُّهُۥ وَهْنًا عَلٰى وَهْنٍ﴾ (Luqmān 31:14)
اَوْهَنُawhanu (elative, ism tafḍīl): the weakest. Only once in the Quran: ﴿وَاِنَّ اَوْهَنَ الْبُيُوْتِ لَبَيْتُ الْعَنْكَبُوْتِ﴾ (Al-ʿAnkabūt 29:41)
Form II (tafʿīl) وَهَّنَ يُوَهِّنُ تَوْهِيْنًاwahhana yuwahhinu tawhīnan: to weaken; to belittle and treat as worthless (this verb is not used in the Quran).
Form IV (ifʿāl) اَوْهَنَ يُوْهِنُ اِيْهَانًاawhana yūhinu īhānan: to weaken; مُوْهِنٌmūhin (active participle, ism fāʿil): one who weakens. Only once in the Quran: ﴿وَاَنَّ اللّٰهَ مُوْهِنُ كَيْدِ الْكٰفِرِيْنَ﴾ (Al-Anfāl 8:18)