This paper introduces Leesik(李植)’s a dictionary of Neo-Confucianism terms, Chohakjahunjeungjib(初學者訓增輯), which has not been discussed before, in terms of its publication, composition, and characteristics. He recognized the limitations of Chengduanmeng(程端蒙)‘s Zixun and Chenchun(陳淳)’s Ziyi, and wrote a new book that synthesizes on the two books. From an educational point of view, he emphasizes the logical relationship among the related concepts, with the focus on the principle of the character combination. In addition, various virtues are supplemented in the book. He faithfully accepts Zhuxi s basic position on the ideological front. Also, I find that this book is based on the concept ‘Tian(天)’ and the principle of Yijing.