In this thesis, the author mainly studies the disyllabic word in the Tale of Buddhist Nun. During the Wei-Jin and the Southern-Northern Dynasties period, the Chinese language changed and developed a lot, with often-used words replacing and new words emerging in a massive scale. Many foreign words were absorbed and localized, with the native languages developing from monosyllable words to disyllable, trisyllable and multi-syllable words. In the development of mediaeval Chinese language, Buddhist sutras were massively translated with spoken language, which was obviously different from the traditional classics. The study of the lexicological and grammar changes of the Chinese language during the Wei-Jing and the Southern-Northern Dynasties period is closely related to the change of human society. It can be learned that words and language differ from time to time. Due to deficient grammar expressions of the Chinese language, semantic components play a significant role in the word composition, so that Chinese words feature mostly the paratactic disyllabic words which are also one of the earliest and primary disyllable styles. There are two language morphemes in Endocentric Words, with one called the modified morpheme representing the main idea and the other called modifier morpheme acting as a modifier. Seen from the sequence of the two morphemes, most modified morpheme come next to the modifier morpheme, leaving only a few coming before the modifier morpheme. Front morpheme of a subject-predicate disyllable word expresses the subject while the after morpheme narrates about the front morpheme, which is also called narrative disyllable word for the narrator and the narrated function assumed by each part. During the Southern and Northern Dynasties period, the verb-object style and verb-complement style were yet to develop. It is universally agreed that these two styles of words were very rare in the pre-Qin Dynasty period. Usually, a reduplicative word holds the same meaning of its singular word, which only has some additional meanings such as emphasis, lasting and one by one. Addition style developed very rapidly during the Wei-Jin and the Southern-Northern Dynasties period, while in the Buddhist sutras of the same period, such style only formed usual words, such as the prefix Lao, appendix Zi, Ran. Monosyllable words consist of reduplicated words and Lianmian words.
