||Seo, Hongwon. (2016). Phonotactic Adaptation in Loanwords: Insertion vs. Deletion. The Linguistic Association of Korea Journal, 24(3), 37-62. The goal of this paper is to investigate what repair strategies can be employed when an illegitimate cluster is adapted into a language which lacks complex margins and how a typology can be dealt with within the framework of the Optimality Theory. Vowel insertion is cross-linguistically preferable over consonant deletion. This tendency is well supported by TCRS (Paradis & LaCharité 1997), but if more than one repair is necessary, deletion inevitably happens depending on perceptual salience and similarity. Concerning the position of vowel insertion, three types are all observed in loanword adaptation: only prothesis, only anaptyxis, and a mixed pattern. For the OT analysis, the ranking permutation between SYLLCON and CONTIGUITY can account for such an asymmetrical typology, in combination with some markedness constraints to comply with phonological restrictions.