طَعَامِ

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

الطَّعَامُ is the natural state of the definite noun and it becomes الطَّعَامِ due to: 1) a preposition that precedes it or 2) a possessed noun that precedes it

الطَّعَامِ loses it’s definite article, becoming طَعَامِ due to it being a possessed noun

Food, the act of eating or feeding

Grammatical analysis of طَعَامِ
اسْمٌ مَجْرُوْرٌ بِالكَسْرَةِ الزَّاهِرَةِ وَهُوَ مُضَافٌ
Surah/Below are the 3 verses in the holy Quran containing the possessed nounطَعَامِ
Verse
69-34And does not urge in the feeding of the poorوَلَا يَحُضُّ عَلَى طَعَامِ الْمِسْكِيْنِ
89-18and urge not one another for the feeding of the needyوَلَا تَحَاضُّوْنَ عَلَى طَعَامِ المِسْكِيْنِ
107-3And does not urge in the feeding of the poorوَلَا يَحُضُّ عَلَى طَعَامِ الْمِسْكِيْنِ