Word by Word Analysis

فَإِنْ أَعْرَضُوا۟ فَمَآ أَرْسَلْنَـٰكَ عَلَيْهِمْ حَفِيظًا ۖ إِنْ عَلَيْكَ إِلَّا ٱلْبَلَـٰغُ ۗ وَإِنَّآ إِذَآ أَذَقْنَا ٱلْإِنسَـٰنَ مِنَّا رَحْمَةً فَرِحَ بِهَا ۖ وَإِن تُصِبْهُمْ سَيِّئَةٌۢ بِمَا قَدَّمَتْ أَيْدِيهِمْ فَإِنَّ ٱلْإِنسَـٰنَ كَفُورٌ 48

But if they turn away - then We have not sent you, [O Muḥammad], over them as a guardian; upon you is only [the duty of] notification. And indeed, when We let man taste mercy from Us, he rejoices in it; but if evil afflicts him for what his hands have put forth, then indeed, man is ungrateful.