great / magnificent / tremendous
Adjective (فَعِيل pattern). Related: عِظَمٌ (greatness), أَعْظَمُ (greater/greatest), تَعْظِيمٌ (glorification). Used for God, the Quran, punishment, and reward.
This verse praises Prophet Muhammad's ﷺ noble character. It is cited as evidence that the Prophet's character itself is a model for humanity.