ض ح کḍ-ḥ-k
(س) ضَحِكَ يَضْحَكُ ضَحْكًاḍaḥika yaḍḥaku ḍaḥkan: (1) to laugh with joy (2) to laugh in astonishment (3) to laugh in scorn. ﴿فَلْيَضْحَكُوْا قَلِيْلًا وَّلْيَبْكُوْا كَثِيْرًا﴾ (At-Tawbah 9:82)
ضَاحِكٌḍāḥik (active participle, ism fāʿil): one who laughs. ﴿وُجُوْهٌ يَّوْمَئِذٍ مُّسْفِرَةٌ ضَاحِكَةٌ مُّسْتَبْشِرَةٌ﴾ (ʿAbasa 80:38–39)
Form IV (ifʿāl) اَضْحَكَ يُضْحِكُ اِضْحَاكًاaḍḥaka yuḍḥiku iḍḥākan: to make laugh. ﴿وَاَنَّهُۥ هُوَ اَضْحَكَ وَاَبْكٰى﴾ (An-Najm 53:43)