"Word Class and Word Formation processes with reference to Mising" discusses properties of the Mising lexicon, focusing primarily on the major open classes-noun, adjective and verb. Data in this paper are mainly taken from the Pagro variety of Mising, which is spoken in and around the Lakhimpur and Dhemaji districts of Upper Assam; however, they appear to adequately typify the basic features of the word classes and the word-formation processes which is common to all attested varieties of Mising.I will discuss certain general features of Mising and some features of the word classes and word-formation processes of other languages only when they are crucial to an understanding of Mising classifiers. We avoid extensive contextual discussion in this paper in order to maximize available space for the descriptive component.