The Truth, The Real, The Embodiment of Truth.
Allah سُبْحَٰنَهُۥ وَتَعَٰلَىٰ is Al-Haqq (in Arabic: ٱلْحَقُّ), meaning: the only reality, the one who is the embodiment of truth, the absolute. Since He is the sole and true God, He has every right to be worshipped. His essence is unavoidable and unchanged.