د ک کd-k-k
(ن) دَكَّ يَدُكُّ دَكًّاdakka yadukku dakkan: to pound something to pieces. ﴿كَلَّآ اِذَا دُكَّتِ الْاَرْضُ دَكًّا دَكًّا﴾ (Al-Fajr 89:21)
دَكٌّdakk (also a noun, ism dhāt): level ground; crushed to pieces. ﴿جَعَلَهُۥ دَكًّا﴾ (Al-Aʿrāf 7:143)
دَكَّآءُdakkāʾu: a mound of soft earth, level with the ground. ﴿جَعَلَهُۥ دَكَّآءَ﴾ (Al-Kahf 18:98)