Classification of Morphemes roots and affixes Roots:that part of a word structure which is left when all the affixes have been removed. A root is the basic unchangeable part of a word and it conveys the main lexical meaning of a word. Roots may be classified into: Free roots and Bound roots Free roots:which can stand as words (care,man)Classification of Morphemes roots and affixes Roots: that part of a word structure which is left when all the affixes have been removed. A root is the basic unchangeable part of a word, and it conveys the main lexical meaning of a word. Roots may be classified into: Free roots and Bound roots Free roots: which can stand as words (care, man)