ءَ

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – ءَ حَرْفُ التَّسْوِيَّةِ is a particle

ء is a particle of equalization / similarity

أَلِفٌ مُتَحَرِّكَةٌ أَوْ هَمْزَةٌء rootWhetherحَرْفٌحَرْفُ التَّسْوِيَّةِ
Alif of movementRootParticleParticle of equalization/similarity
Surah/Below are verses in the holy Quran containing the particle of equalizationأَ
Verse
2-6Truly those who disbelieve, it is the same to them whether you warn them or not warn them, they will not believeإِنَّ الَّذِيْنَ كَفَرُوْا سَوَاءٌ عَلَيْهِمْ أَ أَنْذَرْتَهُمْ أَمْ لَمْ تُنْذِرْهُمْ لَا يُوْمِنُوْنَ
and if you call them to the guidance, they will not follow youوَإِنْ تَدْعُوْهُمْ إِلَى الهُدَى لَا يَتَّبِعُوْكُمْ
7-193it is the same for you whether you call them, or you keep silentسَوَاءٌ عَلَيْكُمْ أَدَعَوْتُمُوْهُمْ أَمْ أَنْتُمْ صَامِتُوْنَ
14-21
26-136
36-10
63-6