Root غ س ق(g s q) has 4 unique word forms and appears 4 times in the Quran.

English gloss Dusk, Dark of night

Word Translation Occurrences
غَاسِقٍ (of) darkness, (of) darkness 2
غَسَقِ (the) darkness, (the) darkness 2
وَغَسَّاقٞ and purulence, and purulence 2
وَغَسَّاقٗا and purulence, and purulence 2