The present paper mainly conerns with the four controversial issues: the exact period in which the Cholik was introduced into Korea, the morphological characteristics, the phonological and semantic aspects of the term itself. First, upon the political and social ground, the Cholik was introduced at the later part of mid-Koryo dynasty. Second, the original form of Cho˘lik was modeled after the Mongolian `pyo˘k-jo˘k-po`, an outwear with pleated skirt. Third, the term `cho˘lik` was derived from Mongolian `terlig`. It came through China with the Chinese letters but the term maintained the Mongolia sound. The variety of the present pronunciations like `cho˘ir`, `cho˘nik`, `cho˘mni` and various notations in Chinese letters could be attributed to different phonological changes and analogy. Last, the original meaning of cho˘lik was somewhat similar to `militia` or `soldier`, but the social function of the wearer gradually disoollored to indicate only the costume for lower officials or the military uniform.