Authored by Mohamed Al-Tounji, "Qamous Al-Bayan fi Atharat Al-Qalam wal-Lisan" is an indispensable Arabic-Arabic dictionary designed to address and clarify common linguistic errors. Far from being a mere list of words, this comprehensive guide meticulously details the pitfalls encountered in both written and spoken Arabic. It serves as a crucial resource for students, writers, and language enthusiasts aiming to refine their expression, avoid grammatical inaccuracies, and master the intricate nuances of the Arabic language. Al-Tounji's work empowers users to achieve greater clarity, precision, and eloquence in their communication.