د خ نd-kh-n
(ن) دَخَنَ يَدْخُنُ دُخُوْنًاdakhana yadkhunu dukhūnan: (of smoke) to rise.
دُخَانdukhān pl. اَدْخِنَةadkhinah: smoke; and from this comes the name of the surah. Twice in the Quran: ﴿ثُمَّ اسْتَوٰٓى اِلَي السَّمَآءِ وَهِيَ دُخَانٌ﴾ (Fuṣṣilat 41:11); ﴿يَوْمَ تَاْتِي السَّمَآءُ بِدُخَانٍ مُّبِيْنٍ﴾ (Ad-Dukhān 44:10)