مَلِكِ

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

المَلِكُ is the natural state of this definite noun and changes to المَلِكِ 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

المَلِكِ loses it’s definite article, becoming مَلِكِ due to it being a possessed noun

King

To possess, have power, reign, rule, have authority, conquer, have control, become the owner of, be capable of, able to obtain, can do, can avail, hold, take a wife

Grammatical analysis of مَلِكِ
اسْمٌ مَجْرُوْرٌ بِالكَسْرَةِ الزَّاهِرَةِ وَهُوَ مُضَافٌ
مَعْرِفَةٌمُفْرَدٌمُذَكَّرٌمَجْرُوْرٌم ل كبَاب ضَرَبَمَلَكَ يَمْلِكُفَعِلٌاسْمٌاِسْمٌ فَاعِلٌ
DefiniteSingularMasculineGenitiveRootKingضPatternNounActive participle
Surah/Below is the only verse in the holy Quran containing the possessed verbal nounمَلِكِ
Verse
114-2The Owner/King of mankindمَلِكِ النَّاسِ