The history dates years ago that emergence of Islam in Malay Peninsular via trading producing the fraction form of these two languages, where the Malay language loaned various word from the Arabic particularly religion words. Besides, the Malays also used the Arabic alphabets in their writing system and add 5 letters due on the language original voice and they named the writing system as Jawi. On the contrary, the existence of Romanized of Malay language today backlash the Jawi morphology order in which it defers with Arabic language morphology system simultaneously. Thus, this could lead the Malay-Arabic Learners to derangement of study. The purpose of this study is to emphasize the differences between loan words writing in Jawi. The researcher used the descriptive study in the interpretation and analysis of differences in the writings. The researcher also used the comparative study in these two language writings. The study concludes that the loaned words changes in the phonetic and the writing system could lead to the commotion of the Malay learners. It is expected that this study will benefit to the writers of teaching Arabic for the Malay speakers and set up a full reference for the Arabic loan words and clarify the changes phonetically or writing or semantically.