One of the important and common approaches in commentary of the verses of the Holy Quran is presenting commentary based on the interpretive analysis of the Quranic lexicon. This issue has been always taken into account by the commentators since the beginning of the Quran revelation and in this regard, in addition to the commentaries, some valuable works have been independently written. Many attempts have been made about lexical studies of the Quran in Tafsir-e Nemooneh and this method has been used to express the divine purpose and denotation of the verses. Some samples of lexical commentary from Tafsir-e Nemooneh have been analyzed from lexical commentary on Ad-Dahr so that in addition to identifying the role of the Quranic terms, the amount of the commentator’s attempt in Tafsir-e Nemooneh is clarified.