çekim: karşılaştırma düsterer · üstünlük am düstersten
köken: From Middle Low German dûster, from Old Saxon thiustri, ultimately from Proto-West Germanic *þiustrī (“dark, without light”). The word also exists in parts of West Central German (compare Luxembourgish däischter), which probably facilitated the borrowing; but the standardised form is definitely from Low German in view of its lacking diphthongisation.
dark, gloomy, dim (without enough light; dark or poorly lit) · gloomy, sad, sullen, morose (sad, joyless, stern, or showing a dark mood) · grim, bleak, dark (unpleasant, hopeless, or suggesting danger and misfortune)
çekim: karşılaştırma по́-мра́чни · üstünlük на́й-мра́чни
zıt: све́тъл, ве́дър, я́сен
köken: Inherited from Proto-Slavic *morčьnъ. By surface analysis, мрак (mrak) + -ен (-en).