Samyeok chonghae is the base book of Manmun Samgukjee which was published in 1650 during the Cheong dynasty. Samyeok chonghae is the textbook of Manchu and the existing edition is reprinted one in 1774. A lot of Korean words in Samyeok chonghae are not registered in the old words dictionary and most of them are misinterpreted. The aim of this study is to examine and find out the exact meanings of the Korean words in Samyeok chonghae. In this study selected rare words in Samyeok chonghae are analyzed and contrasted with those of the existing old words dictionary. As a result of this work, eleven words which are not registered in the old words dictionary and misinterpreted eleven words are selected. It is intended that the words of Manchu Sentence and those of Chinese writing are contrasted one by one and the exact meanings of these words are interpreted for the definite understanding of them. Most Chinese writing words which are not registered in the dictionary are notated phonetically into Korean, which reflects the language universal of the times. It is concluded that Korean character notation for Chinese character words be should registered in the Korean old words dictionary.