Remember, O Muhammad! We told you that your Lord encompasses mankind. We have made the Vision which We showed you, and the cursed tree of Zaqqum which is mentioned in the Qur’an, a test for these people of Makkah. We are giving them warning to be fearful but it only increases their inordinate transgression.
Meaning:-
Encompass: surround and have or hold within, to form a circle about : enclose.
Zaqqum: (Arabic) is a tree that “springs out of the bottom of hell-fire” or Jahannam. It is mentioned in verses 17:60 (as the “cursed tree”), 37:62-68, 44:43, and 56:52, of the Quran.
Inordinate: unreasonable, unjustifiable, unwarrantable, disproportionate, unwarranted, unnecessary,
Transgression: violation of a law, command, etc.; sin.