شَرُّ

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

الشَّرُّ is the natural state of a definite noun and it is in this state ( مَرْفُوْعٌ) when the noun is: 1) the subject المُبْتَدَأُ or 2) the predicate الخَبَرُ or 3) اسْمُ كَانَ or 4) خَبَرُ إِنَّ or 5) الفَاعِلُ subject of a verb in the active voice or 6) نَائِبُ الفَاعِلِ subject of a verb in the passive voice or 7) it’s a noun of dependent declension a) نَعْتٌ / صِفَطٌ adjectives b) التَّوْكِيْدُ emphatic c) المَعْطُوْفٌ conjunction d) البَدَلُ synonym

الشَّرُّ loses it’s definite article, changing to شَرُّ due to it being a possessed noun

To do evil, be ill natured, bad, wicked, find fault, defame

Grammatical analysis of شَرُّ
اسْمٌ مَرْفُوْعٌ بِالضَّمَّةِ الزَّاهِرَةِ
Surah/Below are the 2 verses in the holy Quran containing the nominative, possessed nounشَرُّ
Verse
76-7they fulfil the vow, and they fear a day, its evil will be widespreadيُوْفُوْنَ بِالنَّذْرِ وَيَخَافُوْنَ يَوْمًا كَانَ شَرُّهُ مُسْتَطِيْرًا
Truly those who disbelieve from the people of the book and the polytheists will be in the fire of hellإِنَّ الَّذِيْنَ كَفَرُوْا مِنْ أَهْلِ الْكِتَابِ وَالْمُشْرِكِيْنَ فِي نَارِ جَهَنَّمَ
98-6abiding therein forever, those are the worst of creaturesخَالِدِيْنَ فِيهَآ أُوْلَآئِكَ هُمْ شَرُّ البَرِيَّةِ