Al-Baqara · 2:6

اِنَّ الَّذ۪ينَ كَفَرُوا سَوَٓاءٌ عَلَيْهِمْ ءَاَنْذَرْتَهُمْ اَمْ لَمْ تُنْذِرْهُمْ لَا يُؤْمِنُونَ

As for those who disbelieve, it makes no difference whether you warn them or not: they will not believe

اِنَّ
inna
Meaning
Indeed
Part of speech
Emphasis particle (inna)
Role
Emphasises the whole sentence
Governor
governs its noun + predicate
Case
Particle (mabnī)
Grammar
‘Indeed’ — a particle of emphasis. It puts its noun (‘those who disbelieve’) into the accusative and keeps its predicate nominative; the whole clause is stated with certainty.