This research aims at expressing Bimese Prefixes referring to English in Sentences for maintaining Local Language of Bima. Qualitative Descriptive Method was used. Bimese has free morphemes and bound ones. Process of forming its new words can be described morphologically. It has 11 prefixes consisting of 10 productive prefixes (ka-, ma-, na-, ta-, ra-, da-, di-, sa-, ti-, and ca-) and 1 unproductive prefix (pa-), so its productive prefixes dominate its affixation. They are used to form new words in derivational process only because of changing identities of the words. Bimese Prefixation is derivational. The Bimese and English are contrastively analyzed. The Bimese Prefixes refer to English words, prefixes, and suffix. No English suffix only is referred by the Bimese prefix. The Bimese has monomorphemic words and polymorphemic ones. A Bimese word may have more than one prefix and is never ended by a consonant sound but a vowel one. Its base phoneme never changes after receiving prefixes. Its words which can be combined by the prefixes are five classes: nouns, verbs, adjectives, adverbs, and prepositions. Maintenance of Bimese as a local language and a part of culture is necessarily carried out to be constantly existed and not be destroyed.