دَسَّاهَا

دَسَّاهَا 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
(He) conceals itدَسَّاهَا=هَا+مُسْتَتِرٌ تَقْدِيْرُهُ هُوَ+دَسَّا
(He) buries itit(He)corrupts
Surah/Below is the only verse in the holy Quran containing the verb and third person, feminine, singular objectدَسَّاهَا
Verse
91-10and indeed, he fails who corrupts itوَقَدْ خَابَ مَن دَسَّاهَا