يَغْشَاهَا

يَغْشَاهَا is a verbal sentence  (الجُمْلَةُ الفِعْلِيَّةُ) consisting of a verb and an object in the form of a third-person, feminine, singular attached pronoun

فِعْلٌ وَمَفْعُوْلٌ بِهِمَفْعُوْلٌ بِهِ فَاعِلٌ فِعْلٌ
Verbal sentenceObject SubjectVerb
الجُمْلَةُ الفِعْلِيَّةُAttached pronounDetached pronoun
AccusativeNominative
Covers itيَغْشَاهَا=هَا+مُسْتَتِرٌ تَقْدِيْرُهُ هُوَ+يَغْشَا
It covers itit(it)covers
Surah/Below is the only verse in the holy Quran containing the verb and third person, feminine, singular objectيَغْشَاهَا
Verse
91-4and the night when it covers it (the sun)وَالَّيْلِ إِذَا يَغْشَاهَا