الغَاشِيَةِ

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – الْغَاشِيَةِ is a noun

A noun may either be 1) Definite or indefinite 2) Masculine or feminine 3) Singular, dual or plural 4) Nominative, accusative or genitive

الْغَاشِيَةُ is the natural state of this definite noun and it changes to الْغَاشِيَةِ due to: 1) a preposition that precedes it or 2) a possessed noun that precedes it or 3) it’s a noun of dependent declension a) نَعْتٌ / صِفَطٌ adjectives b) التَّوْكِيْدُ emphatic c) المَعْطُوْفٌ conjunction d) البَدَلُ synonym

Thing that covers; Overwhelming; Covering event

To cover, conceal, come upon.

Surah/Below is the only verse in the holy Quran containing the feminine, active participleالغَاشِيَةِ
Verse
88-1Has there come to you the narration of the overwhelmingهَلْ أَتَاكَ حَدِيْثُ الغَاشِيَةِ