وَقُلۡ إِنِّيٓ أَنَا ٱلنَّذِيرُ ٱلۡمُبِينُ
and say, ‘I am indeed a manifest warner [of punishment from God],’
Agha Ali Puya Commentary
Commentary on Quran 15:89
[Pooya/Ali Commentary 15:89] Mubin implies both openness and clarity-freedom from ambiguity. The message of the Holy Prophet was clear and unambiguous. There was no compromise with evil.