Lexical criticism is a crucial area of literary criticism, prominently represented by Al-Qamus Al-Muhit, which critiques Al-Jawhari's Al-Sihah. The author, Ahmad Faris Al-Shidyaq, emphasized lexical criticism throughout his dictionary, making it a significant reference in this field. The movement began in the early 10th century AH with scholars like Al-Suyuti and evolved in the 11th century with figures such as Baha' Al-Din Al-Amili. By the 14th century, it peaked under Al-Shidyaq and Ahmad Taymour, who both engaged critically with Al-Qamus Al-Muhit. Al-Shidyaq's work Al-Jasous 'ala Al-Qamus, features a preface and twenty-four critiques addressing phrases, structure, meanings, and word derivation in the dictionary. Although he memorized and utilized Al-Qamus Al-Muhit during his travels, he did not hesitate to critique it. His analyses reveal a mix of valid points and criticisms that may stem from textual corruption or his critical approach, highlighting the complexities of lexical criticism in Arabic literature.