We discuss the morphological segmentation of words: segmentation, switching and recurrence; Identification and classification of morphemes; Identification problems: Alomorfia, Amálgama, zero morpheme, empty morpheme, syncretism, redundant morph... The representation of the gerárquica structure of the complex word: representation in square brackets; Characterization of flexion versus shunt. Word-Training procedures: I borrow them, derivation, composition and shortening.