(ض) نَكَحَ يَنْكِحُ نِكَاحًا وَنَكْحًاnakaḥa yankiḥu nikāḥan wa-nakḥan: to marry. ﴿فَانْكِحُوْا مَا طَابَ لَكُمْ مِّنَ النِّسَآءِ﴾ (An-Nisāʾ 4:3); ﴿حَتّٰى تَنْكِحَ زَوْجًا غَيْرَهُۥ﴾ (Al-Baqarah 2:230)
نِكَاحٌnikāḥ (verbal noun, maṣdar, also a noun, ism dhāt): marriage, the marriage contract. ﴿وَلَا تَعْزِمُوْا عُقْدَةَ النِّكَاحِ حَتّٰى يَبْلُغَ الْكِتٰبُ اَجَلَهُۥ﴾ (Al-Baqarah 2:235)
Form IV (ifʿāl) اَنْكَحَ يُنْكِحُ اِنْكَاحًاankaḥa yunkiḥu inkāḥan: to give someone in marriage to someone. ﴿اِنِّيْٓ اُرِيْدُ اَنْ اُنْكِحَكَ اِحْدَي ابْنَتَيَّ هٰتَيْنِ﴾ (Al-Qaṣaṣ 28:27); ﴿وَاَنْكِحُوا الْاَيَامٰى مِنْكُمْ﴾ (An-Nūr 24:32)
Form X (istifʿāl) اِسْتَنْكَحَ يَسْتَنْكِحُ اِسْتِنْكَاحًاistankaḥa yastankiḥu istinkāḥan: to seek marriage, to take in marriage. Only once in the Quran: ﴿اِنْ اَرَادَ النَّبِيُّ اَنْ يَّسْتَنْكِحَهَا﴾ (Al-Aḥzāb 33:50)